Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology for Kate
I want back and posted something today...about 3 posts back. Let me collect some of the Biology tests online for you. When I get them, I'll post them after this post. Sra
Friday, April 22, 2011 at 6:35pm

Biology
I believe that I have answered the following questions correctly, but would like some reassurance. organisms that are used to decontaminate soils may a. store contaminates in their tissues b. release pollutants into the air c. degrade the pollutants d. be plants or ...
Friday, April 22, 2011 at 5:13pm

Biology
I'm having trouble answering this: The average size of a large fish that humans use for food has been decreasing over time, Exp-lain how, exactly, this happens - be sure to discuss genes, proteins, traits, and selection pressure. This is all I can answer :( The large fish ...
Thursday, April 21, 2011 at 8:36pm

Biology project
THE EVOLUTION OF BARBELLUS Describe the type of food that the diffrent Barbellus spieces might have eaten. 1.caterpillar 2 and 3.type of fish
Wednesday, April 20, 2011 at 10:35pm

biology
a male___________ of an angiosperm is a pollen grain.
Wednesday, April 20, 2011 at 9:42am

Biology
What 'EXPERIMENT' did Craig Venter & Francis Collins do in the Human Genome Project? Any links would be great! I've found a lot of info. on what it is, but I'm looking for info on what they did to get there.
Tuesday, April 19, 2011 at 6:01pm

Human & Social Biology
describe how social biologists may help to solve the problems of housing lacking sanitation
Tuesday, April 19, 2011 at 12:27pm

biology
In every energy transactions, some of the energy is also lost as heat.
Saturday, April 16, 2011 at 1:18am

biology
Explain negative feedback and give one example in the human body.
Friday, April 15, 2011 at 12:22pm

biology
Photosynthetic electron transport, like cellular respiration electron transport, is a series of redox reactions. True False I think it is true.
Friday, April 15, 2011 at 12:21pm

Biology
How does the CVS, urinary and respiratory systems work together to maintain homeostasis?
Thursday, April 14, 2011 at 12:56pm

Biology
Suppose you have monohybrid pea plants in your garden and find that they produce round seeds to wrinkled seeds in the ratio of 3:1. If the alleles are designated R and r, respectively, what are the probable genotypes of the wrinkled seeds produced by your plants?
Thursday, April 14, 2011 at 9:23am

biology
I want to imaging collagen and elastin in porcine heart tissue without staining using a confocal microscopy. So far most of the articles that I found are using staining to differentiate the two, is anyone familiar with the microscopy method
Thursday, April 14, 2011 at 3:47am

Biology
Cellular slime molds begin life as a group of seperate organisms,or individuals.After congregation,they become a single multicellular individual.Describe what is meant by this statement.
Wednesday, April 13, 2011 at 11:46pm

biology
specialized cells in animals are all descended from a single ancestor cell.How are the specialized and the nonspecialized cells of the cellular slime molds related?
Wednesday, April 13, 2011 at 11:34pm

Biology
Distinguish between focal adhesions and adheren junctions, desmosomes and hemidesmosomes , and desmosome and focal adhesions
Wednesday, April 13, 2011 at 4:55pm

biology
when they say collagen content in tissue, what do they mean by "content"
Wednesday, April 13, 2011 at 2:32am

Biology
Where can a find a picture of a sheep's lung with labeled parts?
Tuesday, April 12, 2011 at 10:48pm

Biology
The ability to draw from z specific knowledge and experience to make a general explanation is
Tuesday, April 12, 2011 at 9:29pm

Biology
What are some recent (a few months old would be fine) newspaper articles (found online) about molecular biology? (Eg: cloning, genetically modified food, mutation, etc)
Tuesday, April 12, 2011 at 8:51am

biology
true or false.. 1) A mature pine tree produces either male or female cones (F) 2) Virtually all of our food is derived, directly or indirectly from flowering plants. (T) 3) In vegetative reproduction, new plants may be generated from stems or roots. (F)
Tuesday, April 12, 2011 at 7:49am

biology
why warning coloration has to come before mimicry?
Monday, April 11, 2011 at 10:05pm

biology
DNA breaks apart when the _________ bonds between bases break??
Monday, April 11, 2011 at 9:26pm

biology
if a man is a hetero zygote for a trait but the woman is homozygous recessive, what are the chances that their children will be homozygous dominant
Monday, April 11, 2011 at 9:21pm

biology
Compare and Contrast the following thyroid disorders? 1. IODINE DEFICIENCY a. Does it cause goiter (yes or no) b. Is the metabolic too high or too low? (indicate which) c. Effect on TSH levels (will they increase or decrease?) d. What is the most appropriate way to treat this ...
Monday, April 11, 2011 at 2:43am

biology
Is any one body type better than another?
Sunday, April 10, 2011 at 11:17pm

Biology
what signals the cell to replicate the DNA?
Saturday, April 9, 2011 at 1:12pm

Biology
when dna replicates what happens to the chromosomes.?
Saturday, April 9, 2011 at 1:11pm

Biology
What happens when you need more or faster DNA synthesis?
Saturday, April 9, 2011 at 1:10pm

Biology
Why do you need 3 types of DNA synthesis for a chromosome?
Saturday, April 9, 2011 at 1:09pm

biology
1. Owls sleep during the day and are awake at night because of their kind of estivation habituation* circadian rhythm conditioning 2. When a bird sings to signal others of the same species to keep away, it is showing signs of cheerfulness courtship behavior conditioning ...
Friday, April 8, 2011 at 10:13pm

biology
Which of these dyes/indicators do not have a sulfur atom in them?
Friday, April 8, 2011 at 4:11pm

Biology . Ahh , help me with this question please
summarize how unicellular organisms may have given rise to the first animals ? Please , & thank you(:
Thursday, April 7, 2011 at 7:54pm

biology
You are gardening and accidentally puncture your arm with a nail that was in the soil. No significant occurred but your arm was swollen. Recall that soil contains many microorganisms that could be pathogenic. Describe in detail the nonspecific and specific mechanisms that ...
Thursday, April 7, 2011 at 5:17pm

biology
What is the typical ratio for a dihybrid cross between two parents that are double heterozygotes?
Wednesday, April 6, 2011 at 7:14pm

biology
Explain how alignment of chromosomes on the meta phase plate differs in mitosis, meiosis I, and meiosis II. Why are these arrangements important? Can you tell me where zi can find this information? I don't see it in my text. Thank you
Wednesday, April 6, 2011 at 3:11pm

biology
Hi, I appreciate your expert help,and I have a question for you. If I'm asked to decribe resting potential, action poential, and synaptic transmission,in point form;would the following responses be right? Resting Potential: 1.Membrane at resting potential- negative on the ...
Wednesday, April 6, 2011 at 11:45am

biology
what are examples of enzymatic disorders? How do the diseases involve enzymatic reactions?
Wednesday, April 6, 2011 at 10:40am

Biology HELP
Triaglyceride with three F.A.chains of 20 carbon how to calculate the ATP production Plz show the steps thank you
Tuesday, April 5, 2011 at 10:09pm

Biology 12
Triaglyceride with three F.A.chains of 20 carbon how to calculate the ATP production Plz show the steps thank you
Tuesday, April 5, 2011 at 8:28pm

general biology
why is yeast used in the experiment of respiration?
Tuesday, April 5, 2011 at 1:11pm

Biology
There are many differences between the two major cell types: prokaryotes and eukaryotes. However, the different structures and modes of organization perform basically the same functions. Briefly compare and contrast the different features or functions of prokaryotes and ...
Tuesday, April 5, 2011 at 11:56am

Biology
The gene for fur color in rabbits is an incompletely dominant situation: BB rabbits are brown, Bb rabbits are grey, and bb rabbits are white. The gene for fur color distribution is however co-dominant. This gene, S, has two alleles, S1 and S2; S1S1 animals have stripes only; ...
Tuesday, April 5, 2011 at 8:37am

Biology
In Siberian Huskies base fur color is represented by black & white fur BB, tan/yellow & white fur Bb, and white only fur bb. Siberians all posses two style of fur wire hair (W_) and smooth (ww). What would the genotype and phenotype frequencies be for a true breading white ...
Tuesday, April 5, 2011 at 8:37am

Biology
. A woman whose father was color blind (X-linked, recessive) and who has type A blood has accused a man who is himself color blind of fathering her child. The accused man has type B blood. For each of the following cases, indicate whether or not the man might be the father. ...
Tuesday, April 5, 2011 at 8:36am

biology
A gene for flower color can have multiple alleles like purple, white, or red. True ot false?
Monday, April 4, 2011 at 1:19pm

biology
If you toss a coin and it comes up tails on eight consecutive tosses, what is the likelihood it will come up heads on the ninth toss?
Sunday, April 3, 2011 at 11:43pm

Biology
What happens if you increase biodiversity? Decrease it?
Sunday, April 3, 2011 at 7:58pm

interview questions
can someone critique these questions for me please? Describe yourself: I was born in Somalia, but my family and I moved to the states when I was 7 yrs. I want to major in respiratory care and minor in biology. What are your strength/weaknesses. Well my strengths would be that ...
Friday, April 1, 2011 at 8:13am

Biology
Which substance does not leave the nephrons by active transport? a)Potassium ions b)Water c)Calcium ions d)Phosphate ions e)glucose I think its either water or glucose... Another question.. Two strategies- negative feedback and antagonistic hormones- have evolved to maintain a...
Thursday, March 31, 2011 at 6:32pm

biology
A man with normal color vision marries a woman who is colorblind. What percentage of their sons would be colorblind, what percentage of their daughters would be colorblind, what percentage of their daughters would be carriers of the colorblind gene?
Thursday, March 31, 2011 at 1:37pm

biology 101
describe ecosystem of temperate rain forest population growth and regulation thru community interactions
Tuesday, March 29, 2011 at 4:45am

Biology.
Why are glycolen and starch good storage materials?
Monday, March 28, 2011 at 8:35am

Biology - The Stomach
When referring to the lumen of the stomach is that just the opening. As in where are the HCl is and where your food enters? I googled the definition of lumen and it says inside space. I'm just not too clear on what it really means. Thanks.
Sunday, March 27, 2011 at 10:44pm

Biology- GI Tract
I have a question regarding the gastric wall. Do the epithelial cells of the mucosa secrete substances directly into the lumen or do they secrete into the gastric pits then then from there the substances go into the lumen?
Sunday, March 27, 2011 at 10:22pm

Biology - GI Tract
I have a question about Vit B12. Where is it absorbed in the body? In lecture, the professor stated once that it's absorbed in the small intestine and then later stated it was the large intestine. I'm thinking small intestine makes more sense but I'd like to make ...
Sunday, March 27, 2011 at 9:13pm

Biology - GI Tract
In my notes it says that the last 2/3 of the esophagus is controlled by smooth muscle (controlled by ANS and ENS). What is ENS? I'm listening to the lecture the it's something nervous system but I have no idea what the E stands for.
Sunday, March 27, 2011 at 5:31pm

Biology
What will happen to a turgid plant cell with an initial water potential of 0.5 MPa when dropped into a large beaker of water and solute that has a water potential of -1.5 MPa?
Sunday, March 27, 2011 at 2:54pm

biology
Sex is not always a fixed characteristic of an organism. There are a variety of sex switching organisms as well as hermaphrodites who act as either male or female depending on the circumstances. How can we understand the behavior surrounding these strategies?
Sunday, March 27, 2011 at 1:06pm

biology
In a species, there are usually equal numbers of males and females and occasionally not. Furthermore, parents bias investment to male or female offspring. Discuss the relation of these phenomena.
Sunday, March 27, 2011 at 1:06pm

biology
The ability of a forager to find food is often related to the ability of the forager to make decisions in the face of imperfect information about its environment. Discuss the effect that imperfect information has on foraging decisions.
Sunday, March 27, 2011 at 1:05pm

Biology
Sorry for reposting but I really need help with this question and I've waited several hours. What is the trigone of the bladder bounded by? a) top of fundus and uretal orifices b) major and minor calyces c) orifices of ejaculatory ducts and urethra d) uretal and internal ...
Sunday, March 27, 2011 at 2:02am

Biology - The Bladder
What is the trigone of the bladder bounded by? a) top of fundus and uretal orifices b) major and minor calyces c) orifices of ejaculatory ducts and urethra d) uretal and internal urethral orifices
Saturday, March 26, 2011 at 10:07pm

Biology
in cattle a dominant gene (N) results in a deep notch in each ear. a recessive gene (n) results in an "udder" abnormiality when in the homozygous condition. a farmer desires to rid his herd of these characteristics. which of these two alleles would be easiest to ...
Friday, March 25, 2011 at 5:16pm

science(biology)
i want to prepare a chart showing different blood groups and its possible genotype? pllsssss
Friday, March 25, 2011 at 1:54pm

science(biology)
all test crosses are back cross but all back crosses are not test cross.i want to justify this statment.plssssssss
Friday, March 25, 2011 at 1:35pm

biology
In two to three well-developed paragraphs, explain how the graph below helps support the concern that burning fossil fuels has changed the atmosphere. Describe, in your own words, the change shown in the graph and how this change is occurring in the atmosphere. i cant post a ...
Friday, March 25, 2011 at 8:58am

Biology
Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to...
Thursday, March 24, 2011 at 9:55am

BIOLOGY
What happen when you put muscle in acetic acid
Wednesday, March 23, 2011 at 9:28pm

biology
What effect did boiling the liver have on the reaction? Why?
Wednesday, March 23, 2011 at 9:16pm

biology
The primary reaction catalyzed by catalase is the decomposition of hydrogen peroxide to form water and oxygen, which occurs spontaneously, but not at a very rapid rate. Write a balanced equation for this reaction. (Remember that catalase is not a reactant or a product and can ...
Wednesday, March 23, 2011 at 8:57pm

biology /help
6. Erin, Patricia and Larry's daughter, is married to Jeff. Jeff was in a serious car accident and needs a transfusion but Erin is told that Jeff cannot be given her blood. Based on this information, provide Erin's blood genotype and blood phenotype. Can you help me ...
Monday, March 21, 2011 at 10:25pm

Math
A student earned scores of 85, 83, 90, 94, 88 and 84 on the first six tests in a biology class. What score is needed on the seventh test to produce an 86 average?
Monday, March 21, 2011 at 10:15pm

marine biology
Choose the plants from the following list that you would find in the lower shore area of the rocky shore. kelp lichens irish moss rockweed
Monday, March 21, 2011 at 5:34pm

biology
what is the function of the rat diastema??
Sunday, March 20, 2011 at 9:42pm

Biology
How does the structure of macromolecules such as proteins act as an index of relatedness between species?
Saturday, March 19, 2011 at 11:35pm

Biology Research
Hello, I have to analyse two research articles about how carbon dioxide affect plant growth. one of the questions I have to answer is to "compare the research approach" for the two articles. I am not completely certain what " research approach refers to" ...
Saturday, March 19, 2011 at 9:04pm

biology
all test crosses are back cross. but all back crosses are not test cross. justify the statment
Saturday, March 19, 2011 at 5:42pm

English
just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more physical education ...
Saturday, March 19, 2011 at 8:57am

English
I just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more physical education...
Friday, March 18, 2011 at 2:55pm

Biology
why is there no production of ATP when detergent is treated in a test tube with mitochondria? in Aerobic and anaerobic respiration what is the final metabolic breakdown of molecule? 1 pyruvic acid 2 acetyl coenzyme A 3 citric acid 4 reduced coenzyme FADH2 5) ATP PLEASSEEEEEEEE...
Thursday, March 17, 2011 at 9:45pm

biology /help
. The hemophilia gene is located 12 map units from the red-green colorblindness gene on the X chromosome. Red-green colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a hemophiliac and whose ...
Thursday, March 17, 2011 at 8:47pm

biology/science
when an indigestion tablet is placed in water, carbon dioxide is given off. describe the test for carbon dioxide.
Thursday, March 17, 2011 at 7:45am

English
Though I specialized in Germanic languages, I need to present (in a very simple way using a very simple language) some scientific topics in English to Italian 18-year-old-students (studying applied sciences) whose English is very poor. I'm seeking internet sites where ...
Thursday, March 17, 2011 at 6:32am

Biology
Please help with this, What was it important to have a detailed growth curve for your test plant (which was a Lemna spp.) sample on a frequent basis grown under control conditions without a test chemical?
Thursday, March 17, 2011 at 3:12am

biology
If an elodea leave is place in pure distilled water, what will happen? plus will this be isotonic or hypertonic or hypotonic solution.
Tuesday, March 15, 2011 at 10:53pm

biology
what can we use to measure exactly 0.55ml of water. and what can we use to measure exactly 85ml of water.
Monday, March 14, 2011 at 11:19pm

AP Biology- Molecular Genetics
The correct sequence between genes and their phenotypic expression is a) RNA-DNA-protein-trait b) DNA-RNA-protein-trait c) Protein-DNA-RNA-trait d) trait-DNA-RNA-protein I think it is either b or d but do not know if the trait is at the beginnig or end... Once translated, the ...
Monday, March 14, 2011 at 10:50pm

Biology
external features of the rat (rattus norvegicus) What is the function of the diastema? In the female rat , is the vulva always open??? Are the testes always present in the scrotal sacs? is there a bone in the !@#$%^&? if yes wat is this bone called?
Monday, March 14, 2011 at 2:07pm

AP Biology
A biologist measured the amount of DNA in several single diploid cells taken from a culture. He knew that these cells could divide mitotically, but not meiotically. His data is shown below: Cell Number and DNA content in micrograms: Cell 1 (11.1 micrograms) Cell 2 (5.4 ...
Saturday, March 12, 2011 at 9:10pm

Biology
We extract energy from macronutrients primarily from which of the following types of chemical reactions?
Wednesday, March 9, 2011 at 6:32pm

biology
Which of these characteristics is NOT found in the amphibians?
Wednesday, March 9, 2011 at 6:23pm

Biology
You find an unusual organism growing on the bark of a dying tree. Under a microscope, you observe that its cells are eukaryotic, have cell walls, and do not contain chloroplasts. Into what kingdom would you classify this organism? Explain your decision.
Tuesday, March 8, 2011 at 3:11pm

Biology
imaginary population of fruit doves, Half had purple head feathers and half had green head feathers. Describe how natural selection could act upon this population. What change might you see over time? (really need help with this, looked in my textbook i coudnt get it)
Tuesday, March 8, 2011 at 8:44am

BIOLOGY/ A & P
The myelination of central and peripheral axons occurs rapidly through the first few yrs, how can this development process explain the inproved motor abilities of infants and toddlers?
Monday, March 7, 2011 at 2:41pm

BIOLOGY 109
The myelination of central and peripheral axons occurs rapidly through the first few yrs, how can this development process explain the inproved motor abilities of infants and toddlers?
Monday, March 7, 2011 at 1:54pm

Costs and Awards
Look for two programs that appeal to you at Education Planner and complete the chart below for each program. Program Name 1: Bachelor of Science in Pharmacy Degree Insitution: UBC IF Location: Point Grey Campus-Vancouver B.C Length of Program: Four years Tuition Levels (Approx...
Friday, March 4, 2011 at 8:49pm

biology
what is the second law of thermodynamics.
Thursday, March 3, 2011 at 4:02pm

Biology
The human retina has an area of about 1000 mm^2. If we have a total of 125 million rods and 6.5 million cones in each eye, show that we have about 131,500 sensory cells per square millimeter in the retina.
Thursday, March 3, 2011 at 3:25pm

biology
If you inject carbon nanotubes into the body, can we produce antibodies against it? some ideas: - my answer is yes and no... the carbon nanotubes are too large for the t-cell to destroy it; therefore, they won't have an affect. -plus our whole body is made of carbon; ...
Thursday, March 3, 2011 at 12:36pm

Biology
What lines of support are there for evolution and what examples can be seen for each of these?
Wednesday, March 2, 2011 at 9:55pm

Biology
As scientists tried to discover the nature of genes, what three critical gene functions had they identified?
Wednesday, March 2, 2011 at 9:40pm

Biology
As scientists tried to discover the nature of genes, what three critical gene functions had they identified?
Wednesday, March 2, 2011 at 9:29pm

Biology
A space probe discovers a planet inhabited by creatures who reproduce with the same hereditary patterns as those in humans. Three phenotypic characters are height (T = tall, t = dwarf), hearing appendages (A = antennae, a = no antennae), and nose morphology (S = upturned snout...
Wednesday, March 2, 2011 at 9:10pm

biology - glycolysis +atp (help)
9. The total amount of energy released from the chemical bonds of glucose is 2870 kJ/mol, after the initial investment of 2 ATP. The total energy that can be harvested to form ATP molecules is about 1200 kJ/mol. a. After the initial investment of 2 ATP, 38 ATP are produced. ...
Wednesday, March 2, 2011 at 7:28am

Biology - gylcolysis history (help+check)
The process of glycolysis is thought to have emerged very early in the origins of life. What evidence to support this theory can you find in the material presented in this section? Be prepared to defend your ideas. Ans: is this question indirectly related to cell theory, the ...
Wednesday, March 2, 2011 at 7:26am

biology
what forms between the other two primary tissue layers
Tuesday, March 1, 2011 at 11:24pm

biology
A question in Campbell's 8th edition study guide for AP Biology says: A multifactorial disorder _. Answer: has a collection of symptoms traceable to an epistatic gene. There is another answer choice which says : has both genetic and environmental causes. Shouldn't the ...
Tuesday, March 1, 2011 at 9:29pm

Biology- PLEASE HELP ME ):
how does the salinity of a solution affect osmosis in an onion cell?
Tuesday, March 1, 2011 at 6:59pm

Biology
Name the intermediates of the Calvin cycle... I am thinking it is 1) Carbon fixation 2) Reduction 3) Regeneration But I believe it is wrong because they are stages... :S help anybody?
Tuesday, March 1, 2011 at 6:51pm

Biology
The trachea is ___________ to the lungs Toes are _______________to the shoulders Esophagus is _____________ to trachea Pinna is ______________ to tail Liver is ______________ to stomach Options are Anterior, Posterior, dorsal, ventral, lateral, median, superior, inferior, ...
Tuesday, March 1, 2011 at 9:35am

Biology
We did this lab in which we used 3 brands of hand sanitizers and did the kirby bauer test. We measured the zone of inhibition for each of the three trials in millimeter. I need to make a graph, probably a line graph but im not sure what to put for the x and the y axis because ...
Monday, February 28, 2011 at 8:43pm

biology
how to label the ecstasy molecular structure plz name each part the formula is C11 H15 NO2 HCl
Monday, February 28, 2011 at 8:32pm

gr. 12 biology
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the enzyme to react...
Sunday, February 27, 2011 at 9:00pm

Biology
in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge
Sunday, February 27, 2011 at 8:07pm

Biology
how does esctacy work plz i need 3 explanation
Sunday, February 27, 2011 at 6:10pm

biology grade 12
My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity (seconds obviously, these are the times it took the enzyme to react) What am i ...
Sunday, February 27, 2011 at 5:45pm

biology
in what categorize does Esctacy belong to? carbohydrate, lipid, protein or nucleic acid and why. can some give me 2 or 3 exaple why is belogs to it thank you in advenge
Sunday, February 27, 2011 at 4:54pm

Biology
Can you describe at which stage oxygen is involved and explain its role, in photosynthesis please? Also in respiration too if you can :) (my subject at school is phytoplankton) thank you for your help
Friday, February 25, 2011 at 10:27am

Biology
If a human needs to eat about 10 000 kJ per day, estimate (to the nearest gram) the mass of phytoplankton that would be required to meet their daily energy requirements. Based on this value, approximately what proportion of her own body weight in phytoplankton would a 60 kg ...
Friday, February 25, 2011 at 10:16am

Biology
In recent years phytoplankton have been investigated as a potential source of energy for humans. Researchers have therefore been interested in whether these organisms could be ‘farmed’ to provide food or fuel. In terms of biomass, Gross Primary Production (GPP) in ...
Friday, February 25, 2011 at 10:15am

cell biology
What is the mass of 2.00 L of an intravenous glucose solution w/ a density of 1.15 g/ml?
Friday, February 25, 2011 at 8:26am

biology
Suppose that the concentration of H+ in solution #1 is 10,000 times greater than the solution #2. What can you conclude about the difference in pH of these two solutions?
Friday, February 25, 2011 at 2:15am

biology
Explain that the energy needed to produce ATP comes from food during cellular respiration.
Thursday, February 24, 2011 at 11:25am

AP Biology
the process of making a complimentary copy of the DNA to form RNA is called?
Wednesday, February 23, 2011 at 11:22pm

BIOLOGY
Why are seeds considered a more effective means of reproduction than spores in a dry environment?
Wednesday, February 23, 2011 at 10:15pm

Biology
What did Darwin believe is the consequence of overpopulation in animals and plants?
Tuesday, February 22, 2011 at 11:05am

Biology
Darwin believed that Malthus' ideas about human populations applied more strongly to animals and plants. Why?
Tuesday, February 22, 2011 at 10:41am

Biology
Can Someone please trace a molecule of O2 in extreme detail from the air to the a muscle cell in the left calf?
Monday, February 21, 2011 at 12:36pm

Biology
Kay so these are the strands of DNA 5' C C A G T A G T T 3' 3' G G T C A T C A A 5' Let's say the DNA molecule above were the parent strand of DNA. when the strands are split for replication, which strand would be the template for the leading strand? And ...
Sunday, February 20, 2011 at 8:03pm

biology
what is the nature of the walls of the phloem vessels after they are stained in the microscopic section
Sunday, February 20, 2011 at 8:00am

Biology
What organelle do plant cells have that animal cells don't? other than chloroplast.
Saturday, February 19, 2011 at 10:46pm

Biology
An organism has three independently assorting traits AaBbCc. What fraction of its gametes will contain the recessive gene abc?
Thursday, February 17, 2011 at 10:24pm

biology
who made the first dna model and when
Thursday, February 17, 2011 at 5:00pm

French-Simple question
Im trying to find out what each person is studying. Every person in my text has a bubble over their heads, and in that bubble is a picture such as...one person had a bubble picture of a microscope over their heads, so that would mean that they are studing biology. What course/...
Wednesday, February 16, 2011 at 8:58pm

Biology
I need help in my biology lab... [Catalase Lab] 1.What effect did heat have on the activity of the enzyme? What effect did cold have? Room temperature? 2. What effect did lowering pH (making it acidic) have on the activity of the enzyme? What affect did raising the pH (making ...
Tuesday, February 15, 2011 at 6:21pm

biology
what are the four main sources or causes of disease causing agents?
Monday, February 14, 2011 at 5:18pm

Biology: Why do cells divide?
Which cells in the human body divide most frequently? Why is this? What activities or conditions spur cell division? What slows it down?
Sunday, February 13, 2011 at 10:29pm

Biology
what would you use to get the volume of a an cofee cup?
Saturday, February 12, 2011 at 2:30pm

Biology
(purple smooth = 75, white smooth = 28, purple wrinkled = 24, white wrinkled = 8) Account for the difference between the expected and experimental values.
Friday, February 11, 2011 at 11:21am

Biology - Uncertainty (Repost)
I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/- 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/- 4 beats/min. However, what I need to do now is some subtraction...
Thursday, February 10, 2011 at 7:10pm

Biology - Uncertainty
I'm doing a bio lab, and I have collected data on heart rate measured in beats/15 secs with an uncertainty of +/- 1 beat/sec. To get heart rate per minute, I multiplied my data by 4, making my uncertainty +/- 4 beats/min. However, what I need to do now is some subtraction...
Wednesday, February 9, 2011 at 10:32pm

Biology
*distinguish between motif and domain
Wednesday, February 9, 2011 at 12:03am

Biology
If bird DNA is more similar to crocodile DNA than turtle DNA is to crocodile DNA, then... A)birds should be included amoung reptiles B)turtles and birds should be excluded from the reptiles C)the reptiles should be replaced by several new classes D)each of the above represents...
Tuesday, February 8, 2011 at 10:33pm

Biology
All organisms in group 2(birds, fish, mammals, echinoderms, amphibians) except _______ are thought to share a common ancestor that possessed many of the same characterisitcs as the modern lancelets. A)echinoderms B)fish C)amphibians D)birds E)mammals
Tuesday, February 8, 2011 at 10:31pm

Biology
Excluding the echinoderms, all the animals in group 2 (birds, mammals, fish, amphibians) have which of the following characteristics in common? A)protostome embryo, coelom, radial symmetry, dorsal nerve cord B)protostome embryo, no coelm, bilateral, ventral nerve cord C)...
Tuesday, February 8, 2011 at 10:28pm

9th grade biology
How can you tell, using a microscope, that an onion cell has depth?
Tuesday, February 8, 2011 at 5:39pm

biology
using lactose and a ph value of 3,5,7,9,11, Why was there no increase in the reaction rate with 8.0 g. of substrate as compared to 4.0 g. of substrate? What would you need to add to see an increase in the reaction rate with 8.0 g. of substrate?
Tuesday, February 8, 2011 at 10:23am

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