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October 20, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

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math/science
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
Thursday, September 29, 2011 at 4:08am

Biology
Animal cells can take up sucrose against its concentration gradient using a Na+/sucrose symporter. Indicate if the following statements are true or false. 1. In the Na+/sucrose symporter Na+ is also moving against its concentration gradient. False 2. For the symporter to work...
Thursday, September 29, 2011 at 12:05am

biology
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
Wednesday, September 28, 2011 at 2:38pm

Biology
1. How much of the world's population is found in developing countries? Answer a. 44% b. 82% c. 18% d. 52% e. 97% 2.1 percent?
Wednesday, September 28, 2011 at 1:49pm

biology
A. The change in Gibbs free energy of ATP synthesis (acknowledging the body requires 46.3 kJ/mole) is.. This reaction is endergonic or exergonic? The energy for ATP synthesis comes from Is energy used to make ATP transferred in a single reaction or is it the sum of many? ...
Wednesday, September 28, 2011 at 1:34pm

Biology
The process that traps solids in the cell membrane and brings them into the cell is called: pinocytosis phagocytosis ion pumps I think it is phagocytosis because pinocytosis brings in fluid and dissolved substances. I'm not sure if I'm right
Wednesday, September 28, 2011 at 10:05am

biology
i didnt really get any help scientific theory of how life began? any ideas like a easy thing to write about plz
Tuesday, September 27, 2011 at 4:08pm

biology
Evidence of bacteria-like life has been found in fossils that date back between 3.4 and 3.5 billion years. Can you find out what the oldest evidence of multi-celled life is?
Tuesday, September 27, 2011 at 3:40pm

biology
ok so i was learning about cell theory and i am really stuck on this question The text describes one of the scientific theories of where life comes from(which was the cell theory). Find one other scientific theory of how life began and tell me about it. (There are many non-...
Tuesday, September 27, 2011 at 3:13pm

Biology honors (High School)
How does a turbine generate electricity?
Monday, September 26, 2011 at 8:48pm

Biology-- cells
Explain why stomach cells have a large quantity of ribosomes and golgi apparatus ?
Sunday, September 25, 2011 at 8:15pm

Math
100 students were asked whether they are taking psychology or biology. 61 were taking pyschology, 18 were taking both and 12 were taking neither. how many were taking biology?
Sunday, September 25, 2011 at 4:03pm

Math
In a group of 40 students, all students study maths, 28 study biology and math, 20 students study geography and maths and x students study all three subjects. a. Draw a venn diagram to represent the information above, showing in terms of x, the number of students in each ...
Sunday, September 25, 2011 at 1:51pm

biology
is it possible a son is biologicaly older than his parent?
Sunday, September 25, 2011 at 12:34am

biology
With regard to bringing solutes into the cell across the plasma membrane, discuss the advantages and disadvantages of diffusion, facilitated diffusion,active transport,and endocytosis.
Thursday, September 22, 2011 at 7:04pm

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
Thursday, September 22, 2011 at 5:03pm

biology
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
Thursday, September 22, 2011 at 5:01pm

Biology
This is a choose the best answer question: The location of protein synthesis in eukaryotic cells is the a)nucleus. b)cytoplasm. c)plasma membrane. d)Golgi apparatus. d)vacuole. Ok so I know that the sites for protein sythesis are the ribosomes and there are ribosomes on the ...
Thursday, September 22, 2011 at 3:55pm

Animal Skeletal and Muscular Systems
1.) The development of an animal follows which of the following growth sequences? a. cells, organs, tissues, organ systems b. cells, tissues, organs, organ systems c. cells, organ systems, tissues, organs, d. tissues, cells, organs, organ systems 2.) During an operation, a ...
Wednesday, September 21, 2011 at 11:36pm

Biology
What is technolgy?
Wednesday, September 21, 2011 at 8:53pm

Biology
What is the 5th characteristic for all living things? I already have: 1. Heredity 2. Metabolism 3. Reproduction 4. Homeostasis
Wednesday, September 21, 2011 at 7:33pm

biology
explain why the synthesis of proteins, DNA and RNA requires energy. thanks :)
Wednesday, September 21, 2011 at 11:55am

biology
outline why energy is needed for each of these processes: a. the transport of sucrose in a plant b the transmission of an action potential along a nerve axon c. the selective reabsorption of glucose from a kidney nephron I'm not exactly sure how I'm supposed to answer ...
Wednesday, September 21, 2011 at 9:02am

English
I urgently need you to answer this question: 1) Is class the American English for lesson? Because students are asked to choose among three alternatives (one must be correct): a) lesson b) subject c) course If your next ....... is chemistry, physics or biology, go to the labs...
Wednesday, September 21, 2011 at 8:50am

biology
Suppose that I have one liter of water in which the ionization of water molecules has attained equilibrium. What is the hydrogen ion concentration or [H+] of this solution?
Wednesday, September 21, 2011 at 12:40am

Biology
What are two major flaws in the Phylogenetic Tree System?
Tuesday, September 20, 2011 at 10:11pm

English
I just wanted to know which alternatives are better. Thank you very much for your help. 1)I hate doing shopping OR the shopping”?). 2) I do some football OR I play football). 3) I like reading war and car books OR war books and car magazines (?) and collecting model cars...
Tuesday, September 20, 2011 at 5:59pm

Englisch
Can somebody help me to write a summary? The article "Towards a greener Economy?, written in 2009 by friedman, deals about the economic system in unsustainable. The satirical newspaper decribe the americans are wasteful. Than i dont know how can i write the rest of the ...
Tuesday, September 20, 2011 at 12:55pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong. Are the following true or false and support your answer: i. Red blood cells and nerve cells in adult humans are suitable for karyotyping (...
Monday, September 19, 2011 at 10:10am

statistics
1. Use the following information about a group of college students: Fifty percent are taking Algebra. Sixty percent are taking Biology. Thirty percent are taking both Biology and Algebra. A student from the group is selected at random, calculate the following: a) The ...
Sunday, September 18, 2011 at 11:58pm

Biology
Describe how DNA is converted, during transcription, into mRNA through initiation, elongation and termination. In addition, describe how RNA is converted to proteins through the steps of initiation, elongation, and termination.
Sunday, September 18, 2011 at 7:26pm

biology
How would you measure chloride current during an action potential
Sunday, September 18, 2011 at 7:09pm

Biology
why correcting lens is not used so often in microscope ?
Saturday, September 17, 2011 at 9:40pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
Saturday, September 17, 2011 at 9:26pm

Biology
A student claims the probability a human sperm will receive all chromatids of maternal origin is 50 %. Explain why she is wrong.
Saturday, September 17, 2011 at 3:56pm

Science
Hi, I have two questions about biology I need help with. 1) Some questions fall outside the realm of science, which of the following questions could not be answered using the scientific method? A)What is the function of the appendix in human beings? B) Why is it unethical to ...
Saturday, September 17, 2011 at 2:55pm

Biology
In a mouse cell at the start of mitosis, how many chromatids are present?
Friday, September 16, 2011 at 7:49pm

Biology
Typically we talk about blood types as B-positive or AB-negative and so forth. The positive and negative part of the blood type is determined by a completely separate gene (the Rh locus). The ABO locus and the Rh locus are inherited independently, like pea shape and pea color...
Friday, September 16, 2011 at 7:49pm

Biology
3. The ABO blood type is controlled by a single locus, called I, with alleles IA, IB, and IO. These give rise to the blood type phenotypes, A, B, AB, and O. a. Suppose that parents know their phenotypes: the father is type AB and the mother is type O. What are the genotypes of...
Friday, September 16, 2011 at 12:52pm

Biology
Calculate the exact probability that when parents who are both heterozygous for a recessive disease have three children, the oldest will be affected, the middle one unaffected, and the youngest affected.
Thursday, September 15, 2011 at 9:57pm

Biology
A company seeks to develop an herbicide that kills plants by directly interfering (at the cellular level) with plants’ ability to maintain turgor pressure. An herbicide could accomplish this by disrupting the membrane of _____.
Thursday, September 15, 2011 at 9:35pm

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Thursday, September 15, 2011 at 3:34pm

biology
describe the events that take place in the eye when you come from a dark room to the outside where there is light
Thursday, September 15, 2011 at 4:00am

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Thursday, September 15, 2011 at 12:04am

Biology
Can someone please check my answers for the following 'choose the best answer'? Which of the following cellular functions would be most directly related to a malfunction of the Golgi apparatus? a)ATP production b)degradation of macromolecules c)secretion of proteins d)...
Wednesday, September 14, 2011 at 9:03pm

econ
Consider a change in the table in Problem 2-3. The student’s set of opportunities is now as follows: Economics Biology 100 40 90 60 80 75 70 85 60 93 50 98 40 100 Plot this student’s production possibilities curve. Does the PPC illustrate increasing or decreasing ...
Wednesday, September 14, 2011 at 10:58am

ECONOMICS
The following table illustrates the points a student can earn on examinations in economics and biology if the student uses all available hours for study. Economics Biology 100 40 90 50 80 60 70 70 60 80 50 90 40 100 Plot this student’s production possibilities curve. Does...
Wednesday, September 14, 2011 at 10:49am

Biology
is the reaction of calcium chloride with sodium carbonate ionic or covalent
Tuesday, September 13, 2011 at 11:02pm

Biology
Can someone tell me what I can look up to find the cell that is abundant in pus?
Tuesday, September 13, 2011 at 7:42pm

biology
Relate the various levels of organisms to those of nonliving entites. Use specific examples to explain your answers?
Tuesday, September 13, 2011 at 4:24pm

Anatomy/Biology-Please check
I'm posting this again today hoping someone can clarify this for me-I've posted it prior but no one answered yesterday so I'll try again. Thank you in advance I have two question 1.In a dehydration synthesis reaction which of the following occur- a. hydrogen and ...
Tuesday, September 13, 2011 at 2:39pm

Biology
Fats are excellent energy storage molecules because a) they have a relatively high ratio of energy storing C—H bonds. b)they have a relatively high ratio of energy storing C=O bonds. c)they are hydrophobic and do not easily mix with water. d)they have a relatively high ...
Tuesday, September 13, 2011 at 12:34pm

biology
explain how organisims have evolved physiologically to become suited to its environment
Tuesday, September 13, 2011 at 12:23pm

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 9:02pm

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 6:09pm

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 3:27pm

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

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