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September 20, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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Biology
Please help. Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. A) How many cells do you expect will be in this 20 microliters drop you placed under the microscope? B) You add to your sample above ...
Monday, September 12, 2011 at 12:27am

Biology
Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. How many cells do you expect will be in this 20 microliters drop you placed under the microscope?
Sunday, September 11, 2011 at 10:47pm

biology
Our cat had a litter of kittens yesturday . What characterists is this?
Sunday, September 11, 2011 at 9:53pm

biology
Selena noticed that the sand at the beach seemed much warmer than the water. She wondered whether that was because water took more enrgy to heat up than land. I don't understand. What I would like to know here, is what would be the dependent and independent variable. And ...
Sunday, September 11, 2011 at 5:34pm

biology
im so confused with all of these okay so it tells me to do this table thing and the titles on the top are macromolecule,monomers, and function then it had beneath macro. carbohydrates, protein, lipids, and nucleic acids does anyone know how to explain this to me!
Sunday, September 11, 2011 at 2:31pm

biology 12
what is the best method useful for estimating the populations of eagles, and why? i orginally thought counting the number of nests. but i dont know why its the best way of estimating the population. can you plesae correct me if im wrong and help me with the reasoning. thank ...
Saturday, September 10, 2011 at 9:17pm

biology 12
what is the best method useful for estimating the populations of eagles, and why? i orginally thought counting the number of nests. but i dont know why its the best way of estimating the population. can you plesae correct me if im wrong and help me with the reasoning. thank ...
Saturday, September 10, 2011 at 8:15pm

biology
how do I draw a food web for a dog and a horse? arent they both primary consumers I have to answer this.
Saturday, September 10, 2011 at 3:32pm

Biology
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution
Friday, September 9, 2011 at 6:12pm

Biology
Define th seven characteristics of living organisms?
Friday, September 9, 2011 at 3:16pm

biology
How much NaC3H5O3 (in grams) is needed to create a 1000 ml volume of Ringer’s lactate solution?
Thursday, September 8, 2011 at 10:39pm

Biology
These are true and false questions and I want to make sure that I got them right. 1. A water molecule is held together by two single polar covalent bonds. False 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial negative...
Thursday, September 8, 2011 at 10:33pm

Biology
These are true and false questions and I want to make sure that I got them right. 1. A water molecule is held together by two single polar covalent bonds. False 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial ...
Thursday, September 8, 2011 at 6:06pm

biology
How to write an outline for scientific method experiment
Thursday, September 8, 2011 at 4:47pm

Biology
These are true and false questions and I want to make sure that I got them right. 1. A water molecule is held together by two single polar covalent bonds. False 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial negative...
Thursday, September 8, 2011 at 2:54pm

biology
evidence for a reducing atmosphere
Thursday, September 8, 2011 at 11:48am

Biology
These are true and false questions and I want to make sure that I got them right. 1. A water molecule is held together by two single polar covalent bonds. False 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial negative...
Thursday, September 8, 2011 at 1:29am

Biology
These are true and false questions and I want to make sure that I got them right. 1. A water molecule is held together by two single polar covalent bonds. False 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial ...
Wednesday, September 7, 2011 at 9:48pm

ap biology
how has genetic engineering modified darwins theories?!?
Wednesday, September 7, 2011 at 9:44pm

AP Biology
What is important for reproducing animals? i dont exactly understand the question, help!!
Wednesday, September 7, 2011 at 9:32pm

Biology Help!!
Estimates of the quantity of water required in the production of a pound, or Kg, of beef range from _______________ to __________________. What do you think is the most reasonable estimate of the quantity of water needed to yield a Kg. of edible beef - and why?
Wednesday, September 7, 2011 at 8:06pm

Biology Help!!
Estimates of the quantity of water required in the production of a pound, or Kg, of beef range from _______________ to __________________. What do you think is the most reasonable estimate of the quantity of water needed to yield a Kg. of edible beef - and why?
Wednesday, September 7, 2011 at 5:48pm

environmental biology
Why would be important to study extreme habitat and extremophiles?
Tuesday, September 6, 2011 at 10:44pm

biology
why can't inflammation occur in an amoeba?
Tuesday, September 6, 2011 at 7:47pm

biology
what is the death by loneliness
Tuesday, September 6, 2011 at 5:57pm

biology
many organelles and molecules needed for cell division are formed after DNA replication and before mitosis.In which phase are they formed??
Tuesday, September 6, 2011 at 3:55pm

BIOLOGY D:
Many medications used to treat human illnesses are based on substances found in other organisms. How might a decrease in biodiversity affect medical discoveries and treatments.? :o
Monday, September 5, 2011 at 10:19pm

biology
What are the associated organelles and structures of information storage and transferal?
Monday, September 5, 2011 at 9:58pm

biology
I need to describe the processes of fatty acid oxidation and synthesis in animal tissues, pointing out their similarities and differences. Please! I dont need an answer that is just copied and pasted from another website... Thanks,
Monday, September 5, 2011 at 8:12pm

Biology
Sponge bob notices that his pal Gary is suffering form slimotosis , which occurs when the shell develops a nasty slime and gives off a horrible odor. His friend Patrick tells him that rubbing seaweed on the shell is the perfect cure, while Sandy says that drinking Dr.Kelp will...
Monday, September 5, 2011 at 6:12pm

biology
What happens to denatured enzyme? Explain the reason with the help of the lock and key model. -i can explain for the denatured enzyme but how can i expalin it in term of the lock and key model....
Monday, September 5, 2011 at 5:42am

biology
why does it make a difference if you measure metabolic rate in terms of o2/animal or o2/g
Sunday, September 4, 2011 at 2:19pm

Biology
These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ...
Saturday, September 3, 2011 at 2:15pm

Biology
These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ...
Saturday, September 3, 2011 at 1:37am

Biology
1. A medical scientist is designing an experiment to test the results of a new drug that she hypothesizes will greatly reduce and possibly eliminate the side effects of a new cancer treatment. If this experiment is to be set up correctly, she must (A) divide the patients into ...
Wednesday, August 31, 2011 at 9:46pm

biology
Define characteristics of living things
Wednesday, August 31, 2011 at 9:02pm

Biology
Identify the independent variable : The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead.
Tuesday, August 30, 2011 at 9:00pm

human biology
the upper most layer of the skin is
Tuesday, August 30, 2011 at 5:15pm

Biology
Why is it when someone is cooking something, like a cookies or pizza, you can smell it all the way upstairs? like does it have to do with diffusion or something? I'm confused...Thanks in advance :)
Monday, August 29, 2011 at 5:09pm

biology
what is the parts of circulatory system?
Monday, August 29, 2011 at 3:36am

Biology(Please help)
Why are cyanobacteria not bacteria? Is it because they can be nitrogen fixers?
Sunday, August 28, 2011 at 6:34pm

Biology
Identify two ways that scientists address bias in their research. How should I answer?
Sunday, August 28, 2011 at 6:30pm

AP Biology
In the exponential model of population growth, does the growth rate remain constant, decine, or rise and then decline? I have researched this and I believe it to be rise then decline, but I am not really sure.
Saturday, August 27, 2011 at 7:38pm

biology
What are harmones? And their description
Saturday, August 27, 2011 at 12:12pm

biology
What are the uses of moist packs?
Friday, August 26, 2011 at 11:02am

Biology: Ecosystems
What are three groups of organisms that are photosynthetic autotrophs? What are the primary producers of the deep-sea vents?
Thursday, August 25, 2011 at 4:23pm

biology
an organism's reaction to a change in its intenal or external enviroment
Thursday, August 25, 2011 at 1:21am

biology
increase in the amount of living material and formation of new structures in an organism: a characteristic of all living things
Thursday, August 25, 2011 at 1:19am

biology
explantion for a question or a problem that can be formally tested
Thursday, August 25, 2011 at 1:17am

biology
the ability to cause change: organisms use energy to perform biological functions
Thursday, August 25, 2011 at 1:15am

biology
List and describe ways that plants affect/influence your life as a whole and on a daily basis?
Wednesday, August 24, 2011 at 10:14pm

biology
What is the main idea of metabolism. please help
Wednesday, August 24, 2011 at 6:29pm

Biology
Hey! :) When looking at the surface area to volume ratio of a cell it's meant to be that the larger this ratio the more efficient the cell is in diffusion etc. I don't get how a ratio of 6:1 though could be the larger ratio in comparison to 54:27...Im just confused ...
Tuesday, August 23, 2011 at 6:27am

biology
The height of a man grows on cell division.During cancer there will be uncontrolled mitotic division.That is cell divides continuosly.Does the height of the person increase when he get cancer.
Monday, August 22, 2011 at 1:52pm

math
who are the fathers of following subjects a)maths b)physics c)chemistry d)biology e)social
Monday, August 22, 2011 at 9:24am

biology
what is the difference between a chemical that is an irritant compared to a chemical that is corrosive?
Sunday, August 21, 2011 at 4:59pm

biology
what is Rh factor?
Sunday, August 21, 2011 at 6:09am

biology
The effect of gravity on seed germination. why do plants grows towards light
Sunday, August 21, 2011 at 1:16am

Biology
Hypothesis on finding if the dissappearance of a particular fish species from a lake in the northwestern united states is due to acid rain resulting from industrial air pollution
Saturday, August 20, 2011 at 7:42pm

biology
Describe the concept of natural selection. Give some examples.
Thursday, August 18, 2011 at 9:24pm

biology
In reference to plant and animal adaptations, how are the principles of heredity and genetics applicable to how organisms change over time?
Friday, August 12, 2011 at 5:38pm

biology
What are two behaviors in either a plant or animal that demonstrates a circadian rhythm?
Friday, August 12, 2011 at 3:30pm

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 ...
Friday, August 12, 2011 at 10:09am

Biology
What is the primary focus on all biological studies?
Thursday, August 11, 2011 at 7:41pm

BIOLOGY
Please tell me if I am getting them right? PLEASE HELP In a moist area of the woods, you see a mass of small, green plants with tall, thin, non-green projections coming from their centers. These plants are probably A. seed-bearing. B. nonvascular. *** C. drought-resistant ...
Wednesday, August 10, 2011 at 9:57am

biology
Define and distinguish between self-fertilization, cross-fertilization, true-breeding organisms, hybrids, the P generation, the F1 generation, and the F2
Monday, August 8, 2011 at 2:11pm

biology
Hey, I was wondering out of alveoli and red blood cells which had the larger surface area to volume ratio, and whether the one with larger would be generally more efficient in diffusion. Any help or other info on this would be very much appreciated :) Thanks
Friday, August 5, 2011 at 8:13pm

biology
from the phenotype of the kernals on each P generation cob what would the predicted genotype of any F1 plant be?
Wednesday, August 3, 2011 at 10:02pm

biology
Based on what you know about phenotypes and figure 2 for the p generation what is the corn plant genotype on each cob containing the P corn kernals
Wednesday, August 3, 2011 at 10:00pm

biology
an investigation was done to determine the role of petals in insect pollination in apple flowers.when flowers are self pollinated,the tubes grow a little into the stigma and style and fertilization does not take place.(1)10 flowers with petals and 10 flowers without petals ...
Wednesday, August 3, 2011 at 1:29pm

biology
A scientist wishes to determine how effective a vaccine is in protecting rats against a contagious disease. What experimental procedure should the scientist use to determine the vaccine's effectiveness?
Sunday, July 31, 2011 at 5:41pm

biology lab
how to know from the experiment if the oxygen produced as a result of carbon fixation or electron transport? my experiment result show that average bubble/min for tap water is 4.7 while NaHCO3 is 1.8.
Sunday, July 31, 2011 at 4:12pm

biology lab
-rate of photosyhthesis in presence of light intensity & CO2. ~A : sodium bicarbonate in darkness pH b4 xperiment-9 " @ 20 min- 8 " 60 min- 8 ~B: sodium bicarbonate in room light pH b4 xperiment-9 " @ 20 min-9 " 60 min-8 ~C: sodium bicarbonate 20 cm from ...
Saturday, July 30, 2011 at 9:03pm

biology
what is the original color of Phenolphthalein solution? pink or colourless?
Saturday, July 30, 2011 at 2:33pm

biology
how to calculate the class average of millilitres of CO2 exhaled per minute?
Friday, July 29, 2011 at 11:25am

biology
what compound is formed when CO2 is bubbled through water?show the reaction.
Friday, July 29, 2011 at 11:24am

biology
how does concepts of chemistry affect biology?
Tuesday, July 26, 2011 at 6:20pm

biology
i need an article that can explain the scientific method to create hypothesis or designing an expermient
Tuesday, July 26, 2011 at 4:28pm

Biology
Write true or false: 1. A root hair is a small extension of an epidermal or outermost cell layer of a dicot root 2. Layers of parenchyma cells make up the cortex of a dicot root and the central pith of a monocot root. 3. Outside the endodermis is a tissue called the pericycle ...
Monday, July 25, 2011 at 7:42am

biology
how many chromosomes are present in ostrich? how many chromosomes are present in monkey? how many chromosomes are in lacto bacteria
Sunday, July 24, 2011 at 2:57am

Biology
What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?
Saturday, July 23, 2011 at 1:31pm

biology
how can i identify the cell if it is plant or animal cell??
Saturday, July 23, 2011 at 3:49am

science-biology..cells
please give me those parts of animal cell and plant cell.. please seperate it..
Saturday, July 23, 2011 at 3:35am

biology
You are attempting to determine whether a plant-derived processed food sample (for example, a corn chip) contains material from a genetically-modified organism (GMO). First, you crush the sample and attempt to extract DNA from it. Next, you perform PCR using two different sets...
Friday, July 22, 2011 at 7:17pm

Biology
Briefly describe what effect you expect each of the following variables to have on enzymatic activity. 1. pH of 3.0 2. decrease in temperature 3. increase in substrate concentration 4. increase in enzyme concentration 5. addition of phenylthiourea(PTU)
Friday, July 22, 2011 at 3:45pm

biology
lipid soluble toxins must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton
Friday, July 22, 2011 at 10:44am

biology
(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity
Friday, July 22, 2011 at 10:43am

biology
(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity
Friday, July 22, 2011 at 1:28am

biology
lipid soluble must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton
Friday, July 22, 2011 at 1:27am

biology: genetics
You are attempting to determine whether a plant-derived processed food sample (for example, a corn chip) contains material from a genetically-modified organism (GMO). First, you crush the sample and attempt to extract DNA from it. Next, you perform PCR using two different sets...
Wednesday, July 20, 2011 at 1:02pm

biology
hemophilia is a sex linked recessive disorder. A man who has a hemophilia has a daughter who has a normal phenotype. She marries a man who also does not have hemophilia. what is the chance that they will have a daughter who has hemophilia? what chance will their son have ...
Wednesday, July 20, 2011 at 12:48pm

biology help
color blindness is a sex linked disorder caused by recessive allele on the X chromosome. XC= normal vision. Xc= color blind. if a normal vision man marries a color blind woman, what are the chances that they will have a color blind son? what a color blind daughter? show your ...
Tuesday, July 19, 2011 at 6:33pm

biology
In Drosophila melanogaster, cut wings (ct) is recessive to normal wings (ct+), sable body (s) is recessive to gray body (s+), and vermilion eyes (v) is recessive to red eyes (v+). All three recessive mutations are X- linked. A female fly with cut wings, sable body, and ...
Monday, July 18, 2011 at 10:10am

biology: genetics
In Drosophila melanogaster, cut wings (ct) is recessive to normal wings (ct+), sable body (s) is recessive to gray body (s+), and vermilion eyes (v) is recessive to red eyes (v+). All three recessive mutations are X- linked. A female fly with cut wings, sable body, and ...
Sunday, July 17, 2011 at 10:11pm

Biology
In your own words, explain the second law of thermodynamics and explain why it is not violated by living organisms?
Sunday, July 17, 2011 at 5:58pm

Biology
What is the "biological hierarchy"? Is it kingdom, phylum, class, order, family, genus, species? Or is it organelle; cell; tissue; organ; organism; species; community; population; ecosystem; biosphere? Which one is it referring to?
Sunday, July 17, 2011 at 2:00pm

biology
some people in old age complain of stiff joints. what is the possible reason for it? please help, need answer related to bones and joints, level middle school biology
Saturday, July 16, 2011 at 11:14am

biology
some people in old age complain of stiff joints. what is the possible reason for it?
Saturday, July 16, 2011 at 9:54am

biology
1 mole of an element or compound contains 6.20 times 10 to the 23rd power atoms or molecules of the element or compound. 1 mole of an element or compound has a mass equal to its mass number (or molecular weight) in grams. For example, 1 mol of hydrogen gas (H2) contain 6.02 ...
Friday, July 15, 2011 at 8:56pm

biology
a student used water as a medium in a temporary blood stick. he could observe only ruptured cell under microscope. why doese this happen ? plzzzz tell flash.
Friday, July 15, 2011 at 2:24am

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