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Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
a disease caused by a bb gene is said to be?
Wednesday, November 30, 2011 at 2:21pm

English
Thank you very much for your suggestion. What do you think of the book "Marine Biology: Function, Biodiversity, Ecology, by J.S. Levinton? Could you also suggest a book which could help us get to know the relevant English terminology?
Tuesday, November 29, 2011 at 11:59am

Biology
Describe how the location of each part of the cellular respiration is diffrent in bacteria and in more complex cells?
Monday, November 28, 2011 at 9:06pm

Biology
Can you explain what the quality of the reverse transcriptase in the HIV virus has to do with the problem that there is still no vaccine against the HIV virus?
Monday, November 28, 2011 at 7:57pm

biology
divides the new plant cells in telophase
Monday, November 28, 2011 at 5:55pm

Biology
the covalent bond between the monomers of an enzyme macromolecules are peptide ester or phosphodiester bond question2 why urctic forx change coloring from brown in summer and white in winter . My answeers is = fox change phenotype but genotypes does not chane? am i right ?
Sunday, November 27, 2011 at 11:11am

BIOLOGY
Is eye color a discontinuous or continuous variation? Why is everyone saying that it's a discontinuous variation, when you obviously have a gradation of different colors around the world in the human population, and it's a polygenic trait determined by many genes! So ...
Sunday, November 27, 2011 at 1:54am

Biology please help anybody!
there's this a level question in a ten-year series book in 2008, the question asks what is the sequence in which it occurs: 1. polyadenylation 2. removal of introns 3. splicing exons 4. capping And the options given are: a) 1,3,2,4 b) 2,4,1,3 c) 3,1,4,2 d) 4,2,3,1 I've...
Saturday, November 26, 2011 at 7:54am

Biology
If an RR genotype is crossed with a Rr genotype, which color flowers would the offspring least likely have? a.) red b.)white I think it would be white, but I'm not sure...
Friday, November 25, 2011 at 3:50pm

Biology
In order to predict the percentage of males and females three assumptions must be considered: 1. The X carrying sperm and Y carrying sperm have an equal chance of fetilization: 2. The egg and sperm combine at random: 3. the XX and XY zygotes have equal chance of development at...
Thursday, November 24, 2011 at 7:20pm

Biology
The gene for color blindness in humans is found on the X chromosome. A boy has a color-blind father. Will the boy be color blind? Explain.
Wednesday, November 23, 2011 at 3:47pm

biology
19. How does polygenic inheritance differ from Mendelian inheritance?
Wednesday, November 23, 2011 at 2:00pm

Biology
describe the following processes in the plant life cycle and why they are important for the plant to complete, listing all of the plant hormones involved and describing their functions: 1) elongation of the plant shoot. 2) the process by which seeds orient themselves. 3) ...
Monday, November 21, 2011 at 9:56pm

Biology
A relationship in which a single celled organisms live within the cells of another organism is called what?
Monday, November 21, 2011 at 8:02pm

Biology-Is my answer correct
Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right? A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis of the ...
Monday, November 21, 2011 at 7:07pm

Biology
Which of the following must occur for a mismatch error to be repaired? Which is the best answer, I think it's A, am I right? A)Damaged DNA must be identified by DNA repair proteins B)The sequence of nucelotides in the damaged DNA sequence must guide the synthesis of the ...
Monday, November 21, 2011 at 6:31pm

Biology
What is the maximum number of different blood types the children of a man with blood type A and a woman with blood type B could have? A. One B.Two C.Three D.Four I think it's D, but I'm not sure. Help would be appreciated.
Monday, November 21, 2011 at 9:18am

Biology 11
the genotype of the hybrids of two pure-breeding pea plants that each have white flowers and round seeds (both traits dominant) would be?
Sunday, November 20, 2011 at 5:18pm

Biology
In regard to the kidney, Why is everything dumped into the tubule? Why not dump only wastes and toxins like insects?
Saturday, November 19, 2011 at 4:41pm

Biology
Please help, anyone! There's 3 types of gene mutation: substitution, deletion, and insertion, right? So what are '2 kinds of gene mutation that causes the protein to be not formed'?? I mean, gene mutations may cause non functional proteins, but that's not the ...
Thursday, November 17, 2011 at 12:04am

Biology
Is urine normally found in bladder of fetal pig? Why or why not?
Wednesday, November 16, 2011 at 6:09pm

Biology
Please help: In glycolysis followed by either lactic acid or alcoholic fermentation produce _____ ATP molecules, while cellular respiration using oxygen produces ____ ATP. 1) 2,8 2) 4,2 3) 2,4 4) 2,38 Thanks a million!
Wednesday, November 16, 2011 at 12:25pm

Biology
Each phenotype can only be represented by a single genotype. True or False? Help would be appreciated, thanks in advance!
Tuesday, November 15, 2011 at 6:32pm

Biology
what are the radiometric dates of: Homo sapiens, stone tools, sabre toothed cat, wolly mammoth, apes, whales, horses, dinosaursflowering plants, birds, earthworms, reptiles, spiders, sharks, amphibians, land plants, jawless fish, jellyfish bacteria and photosynthetic organisms?
Tuesday, November 15, 2011 at 3:04pm

biology
during translation, the amino acid detaches from the transfer RNA attaches to the end of a growing protein chain when?
Monday, November 14, 2011 at 7:33pm

science - biology
What is the health advantage that can result in sickle cell hemoglobin?
Sunday, November 13, 2011 at 8:38pm

Biology
When dissecting a fetal pig, how can you tell the difference between veins and arteries? I remember someone saying something about if you poke one, its spongier or something? help! Thank you!
Sunday, November 13, 2011 at 7:05pm

biology
Please help to write a assignment on the topic Biotechnological applications in agriculture and medicine .how to write it?
Sunday, November 13, 2011 at 10:00am

biology
another way to afect the enzyme is lowering the pH of the solution. However, lactase is supposed to be able to work in the stomack. Would lowering the pH of the enzyme solution affect the enzyme? Why or why not?
Friday, November 11, 2011 at 11:12am

biology
The causes of cancer may include which of the following? A. environmental influences B. UV radiation C. viruses D. all of the above
Thursday, November 10, 2011 at 3:37pm

English
I forgot to add these few more things. They are really urgent. Thank you. 1) I told my collegues about the possibility of carrying out a Comenius project on how to write the screenplay and shoot (make) a film. 2) As a matter of fact, they would rather be involved in a project ...
Thursday, November 10, 2011 at 1:51pm

biology
One advantage of electron microscopes over light microscopes is their _____. A. size B. higher magnification C. two-dimensional image D. use of live specimens
Thursday, November 10, 2011 at 11:33am

Biology
What is the difference between beta and alpha glucose.
Wednesday, November 9, 2011 at 8:39am

Biology
Which of the following would increase the chance of a successful infection? A. The host has a strong immune system. B. The pathogen is very virulent. C. The pathogen population at the infection site is small D. A and B E. A, B, and C
Wednesday, November 9, 2011 at 12:31am

Biology
7) The dumping of large amounts of raw sewage into rivers or lakes typically leads to massive fish kills, although sewage itself is not toxic to fish. Similar fish kills also occur in shallow lakes that become covered in ice during the winter. What kills the fish? How might ...
Tuesday, November 8, 2011 at 4:39pm

Biology
6) In detective novels, “the odor of bitter almonds” is the tell-tale clue to murder by cyanide poisoning. Cyanide works by attacking the enzyme that transfers electrons from the respiratory electron transport chain to O2. Why is it not possible for the victim to ...
Tuesday, November 8, 2011 at 4:39pm

Biology
3) How many carbon dioxide molecules are liberated after each cycle of the Krebs cycle? For a single glucose how many carbon dioxide molecules were already liberated by the aerobic respiration at that point?
Tuesday, November 8, 2011 at 4:39pm

Biology
2) Why can it be said that each glucose molecule runs the Krebs cycle twice?
Tuesday, November 8, 2011 at 4:38pm

Biology
4) Explain why organisms do not violate the second law of thermodynamics?
Tuesday, November 8, 2011 at 4:37pm

Biology
Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)? A. Phosphate B. Amino C. Hydroxyl D. Carbonyl E. Carboxyl
Sunday, November 6, 2011 at 10:44pm

Biology
If a protein's primary structure is predetermined or directed by a "source." what might this "source" be?
Sunday, November 6, 2011 at 8:12pm

Biology
There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein molecule consisted of 100 amino acids, how many combinations are possible? What is the probability that out of the total possible combinations of the 100...
Sunday, November 6, 2011 at 8:10pm

Biology
How can you experimentally determine the total volume of blood in a human?
Sunday, November 6, 2011 at 7:02am

Biology
Two parents are blond haired and their children are blond haired. Why is this so?
Sunday, November 6, 2011 at 6:24am

Science-Biology
If a mother has brown eyes and a father has blue eyes why do two of their children have blue eyes and one have brown eyes?
Sunday, November 6, 2011 at 5:29am

English
Could you please check these sentences? Thank you. 1) We're looking for a high school in which subjects such as biology or geography are taught in English so that in the future our students could carry out a project on a common theme in English. 2) I really hope your ...
Saturday, November 5, 2011 at 6:59pm

Science-Biology
To note: all three are blond, ellie's eyes are brown, her brothers are blue. Ellie's father is homozygous for eye colour but her mother is heterozygous. She passed a 'blue eye' gene to the boys and a 'brown eye' gene to Ellie. Brown hair is dominant ...
Saturday, November 5, 2011 at 3:15pm

Biology
I have written an answer for the question below. Why do Ellie and her brothers resemble her parents? Explain how genetic information passes from parents to their offspring. Please check if i have included all the scientific words and if i have explained how genetic information...
Saturday, November 5, 2011 at 8:52am

science-biology
why do we study the human organ system?
Saturday, November 5, 2011 at 5:56am

biology
if offspring exhibit a 3:1 phenotype ratio, what are the genotypes of the parents?
Wednesday, November 2, 2011 at 9:29pm

Science (urgent)
I have 2 biology questions I really need help with, they are due tommorow and I don't know if I'm right. 1)As an energy carrier, ATP differs from NADPH in that: a)ATP carries less energy than NADPH. b)ATP transfers energy through redox reactions whereas NADPH uses ...
Tuesday, November 1, 2011 at 8:29pm

biology
snail in the low oxygen environment what aspects of the new environment will be salient snail and how will aspects act as selective forces
Tuesday, November 1, 2011 at 7:29pm

biology
please can you answer the following questions in as much dephth as possible. why do people use drugs? what are the effects (short & long) of use of hard drugs? the cannabis debate- what is cannabis and why do people use it? what are the risks involved with use? are people more...
Tuesday, November 1, 2011 at 3:27pm

biology
find a drug scandal within a sportig event and write some notes about it.
Tuesday, November 1, 2011 at 2:44pm

biology
how reliable are tests for drugs in sport?
Tuesday, November 1, 2011 at 2:42pm

biology
snail in the low oxygen environment what aspects of the new environment will be salient to your species and how will aspects act as selective forces
Tuesday, November 1, 2011 at 11:51am

Biology
Can genetic mutations also occur within mitochondria and cause diseases? if yes, how common are these diseases?
Monday, October 31, 2011 at 1:52pm

Biology
Does light wavelength affect cellular respiration rate? I know that it affects photosynthetic rate. I think it is not supposed to affect cellular respiration rate, but I recently conducted an experiment that has proved otherwise and I just want to make sure about the facts ...
Monday, October 31, 2011 at 1:15am

Statistical significance (Chi squared)Please check
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 7:36pm

Statistical significance test
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 5:57pm

Calculating Chi Squared
did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Sunday, October 30, 2011 at 3:57pm

Calculating Chi Squared
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. For the ...
Saturday, October 29, 2011 at 6:34pm

Statistical significance (Chi squared)
I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for chi^2 is Calculating Chi Squared - Catherine, Friday, October 28, 2011 at 8:15pm I did a biology experiment where I need to analyze the ...
Saturday, October 29, 2011 at 3:59pm

Biology
the biome with the fewest seasonal changes is?
Saturday, October 29, 2011 at 2:48pm

English
1) Writeacher, I need the help of a science teacher to find a theme high-school students (aged 16 and 17) can investigate with their German and French partners. Our students study biology (also bilotechnologies) , chemistry, and earth science. 2) Can you check these two ...
Saturday, October 29, 2011 at 9:01am

biology
I really need help i am so confued !! use the crossover values given to calculate the sequence and the distance apart of the genes indicated P-m 7% K-m 28% P-K 21% m-C 5%
Saturday, October 29, 2011 at 12:29am

Biology
i really need help i am so stuck!! use the crossover values given to calculate the sequence and the distnace apart of the genes indicated p-m 7% K-M 28% p-k 21% m-C 5%
Friday, October 28, 2011 at 11:38pm

Biology 110
Displacement of O2 from its respiratory pigment: A. occur more rapidly in cold temp. B. occur more slowly when Ph alkaline. C. occur more slowly when O2 tissue level low. D. none of these.
Friday, October 28, 2011 at 9:05pm

Biology 110
True or false 1. Warm temp increase the release of CO2 from hemoglobin in the peripheral circulation. 2.Exchange of respiratory gases is by diffusion as a result of concentration gradient. 3. Residual air is necessary to maintain patent alveoli and prevent lung collapse.
Friday, October 28, 2011 at 8:59pm

Biology 110
by means of a chemical equation, show how the body rids itself of the major end-products of metabolism. Please explain.
Friday, October 28, 2011 at 8:56pm

Calculating Chi Squared
I did a biology experiment and I have to use the chi^2 method to calculate statistical significance. I got data at different time points and I just want to make sure what I'm calculating this right. The data I got for one time point are 6 and 23 I know the equation for ...
Friday, October 28, 2011 at 7:06pm

biology
what is the promoter sequence for transcription? in regards to nucleotides
Friday, October 28, 2011 at 5:22pm

biology
list two types of active transport that use specific protein recognition
Friday, October 28, 2011 at 5:16pm

biology
why is glucose converted into hexose bisphosphate in glycolysis ??
Friday, October 28, 2011 at 3:30pm

biology 1
what kind of elecrtical charge is found on the oxygen atom of a polar water molecule
Friday, October 28, 2011 at 2:43pm

Biology
1) What is the minimum number of single nucleotide substitutions that would be necessary for each of the following amino acid replacements? a. trp -> lys b. met -> his c. tyr -> gly d. ala -> asp   2) A mutation is isolated that can not be induced to revert. ...
Friday, October 28, 2011 at 11:38am

Biology
Which of the following is not a benefit of genetic counseling: a.It helps identify parents at risk for having children with genetic defects. b.It assists parents in deciding whether or not to have children. c.It is based exclusively on family pedigrees. d.It helps identify ...
Friday, October 28, 2011 at 10:01am

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Friday, October 28, 2011 at 12:16am

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 at 8:58pm

Statistical significance
I did a biology experiment where I need to analyze the statistical significance of betweeen a data set. My experiment consisted of measuring the effects in photosynthesis and cellular respiration by exposing solutions with leaf discs to different light wavelength. Forthe ...
Thursday, October 27, 2011 at 8:00pm

9th grade Biology
4. After the temperature reaches 33 degrees Celcius, the rate of photosynthesis declines. Using knowledge of enzymes, explain why this happens. 6. As the amound of CO2 increases, what would happen to the rate of photosynthesis? And as the amount of CO2 increases, would the ...
Thursday, October 27, 2011 at 7:04pm

Biology
If a male's left vas deference is blocked. how is his sperm count affected? Explain you answer .. well wt i know is that the sperm count would decrease as less sperm moves from the epididyms into the urethra.
Thursday, October 27, 2011 at 2:59pm

Biology
What are the positive and negative impacts on biodiversity? I can't seem to find too much online. If you can give a short description of each it would be appreciated but not necessary!
Thursday, October 27, 2011 at 3:54am

Biology 110
Name the 4 functions of the respiratory system. 1. 2. 3. 4.
Wednesday, October 26, 2011 at 8:58pm

Biology 110
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 at 8:43pm

Biology 110
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 at 8:43pm

biology 110
name 4 functions of the nose.
Wednesday, October 26, 2011 at 8:30pm

biology
Name 4 functions of the respiratory system.
Wednesday, October 26, 2011 at 8:29pm

biology
Jane is 28 yrs old dx with MS. Explain to her 10yrs old, what MS is, why, how, and when did it happen?
Wednesday, October 26, 2011 at 8:28pm

biology
Jim has been stung by 35 bees and is going into anaphylactic shock. How is this happening; why is it happening; what can I do to help?
Wednesday, October 26, 2011 at 8:26pm

biology
Name the 4 factors that control the amount and rate of gas exchange.
Wednesday, October 26, 2011 at 8:23pm

Biology
In guinea pigs, gene B is for black, b is for white the heterozygote is a mixture, called agouti. ( sex linked and non dominant) , a litter consists of 5 agouti females and 6 black males , if the parents of this litter had more offspring , what other phenotypes would you ...
Wednesday, October 26, 2011 at 4:34pm

Biology
In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances of their children ...
Wednesday, October 26, 2011 at 4:31pm

Biology
Suppose that a clolur blind man has parents with normal vision. Would all his sons be colour-blind ? Was his mother a carrier ? would all his daughters be carriers
Wednesday, October 26, 2011 at 4:28pm

Biology
My teacher asked me this question and I do not know the answer would you be able to tell me and why thank you large bodies loose a smaller percentage of heat to their surroundings than smaller bodies. Why?
Wednesday, October 26, 2011 at 8:39am

Biology
What are the three reaction pathways which pyruvate undergoes in the metabolic pathways inside the cell and what are the names of the final products of each of these pathways?
Wednesday, October 26, 2011 at 12:07am

biology
You are conducting an experiment to determine whether lichen populations are affected by local airborne pollutants. Which of the following observations would best support your hypothesis that high levels of airborne pollutants cause a reduction in lichen abundance: a) lichens ...
Tuesday, October 25, 2011 at 11:11pm

Biology, Art
I was doing some research for a wildlife art contest in January and I can't seem to find a specific bit of information that is crucial to my painting. The contest requires me to paint a Greater Short Horned Lizard (Phrynosoma hernandesi) and I know that some species of ...
Monday, October 24, 2011 at 10:07pm

Biology
Locate a diagram of an organism with the main organs and structures labeled. Locate a diagram of an organism with the main organs and structures labeled. Briefly explain how the organism in the diagram has evolved physiologically to become suited to its enviroment
Monday, October 24, 2011 at 2:45am

Biology/math?
If ‘pi’ is approximately 3.14, and your field of view is 3 mm in diameter, what is the area of your field of view?
Monday, October 24, 2011 at 12:18am

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