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Homework Help: Science: Biology

Recent Homework Questions About Biology

Biology
Do all living organisms undergo sexual reproduction?
Tuesday, December 20, 2011 by Anonymous

biology
what is the length of trecha in men
Monday, December 19, 2011 by zainab

BIOLOGY
WHAT DO YOU MEAN BY A "SUITABLE CONTROL" IN AN EXPERIMENT? WHAT WOULD BE THE "SUITABLE CONTROL" IN AN EXPERIMENT TO INVESTIGATE THE EFFECTS OF DIFFERENT LIGHT INTENSITIES ON RATE OF PHOTOSYNTHESIS?
Sunday, December 18, 2011 by SMK

Biology
What is the difference between thromboplasin and factor Xa? I have in my notes that they both convert prothrombin to thrombin.
Tuesday, December 13, 2011 by Matt

biology
Is it normal for variation to occur within a group? Explain.
Monday, December 12, 2011 by lola

biology
A dominant gene V in humans causes certain areas of the skin to become depigmented, a condition called "vitiligo." Albinism is the complete lack of pigment production and is produced by the recessive genotype aa. The albino locus is epistatic to the vitiligo locus. ...
Monday, December 12, 2011 by Alex

Biology
Using RNA a s a template for prot e in synthesis instead of t r ans l a t ing prot e ins directly from the DNA is advantageous for the cell because A) RNA is much more stable than DNA. B) RNA acts as an expendable copy of the genetic material, allowing the DNA to serve as a ...
Sunday, December 11, 2011 by Matthew

Biology
When elongated, tube-shaped cells from the lining of the intestine are treated with a certain chemical, the cells sag and become round blobs. The internal structures disrupted by this chemical are probably _____. A. cell junctions B. microtubules C. rough endoplasmic reticulum...
Sunday, December 11, 2011 by Anonymous

Biology
Which one of the following organelles would be especially abundant in the pancreatic cells that produce digestive enzymes? A. rough endoplasmic reticulum B. smooth endoplasmic reticulum C. lysosomes D. microfilaments E. mitochondria Apparently the answer is not lysosomes, so ...
Sunday, December 11, 2011 by Anonymous

Biology
Using the codon table, determine the sequence of the protein that will be produced from the mRNA sequence below. Be sure to begin with a start codon. 5'-CCCAAUGUUGCGGCCAUGACAC-3' A. N-Methionine-Leucine-Arginine-Proline-C B. N-Methionine-Histidine-Serine-Threonine-&#...
Saturday, December 10, 2011 by Mariana

science-biology
On my homework there's a diagram of a flying bird with the allele of aa and then there's an arrow pointing to the land with 3 birds on the ground with the alleles AA. What would the allele frequency of A change from? A)1 to .75 B)0 to .25 C)0 to .75 D)1 to .25
Saturday, December 10, 2011 by jon

biology
Relationship between free energy change and metabolism in biological system
Friday, December 9, 2011 by BIOLOGY

Biology
If the concentration of a sample is 81.5ng/ul, What is the volume needed to concentrate the sample to get a concentration of 200 ng/ul?
Thursday, December 8, 2011 by Moli

Biology
explain the process of adaptive radiation, and how are reproductive barriers important to speciation
Thursday, December 8, 2011 by Melissa

science-biology
I'm pretty sure the answer is A, am I correct? Natural selection tends to A) increase the frequency of characteristics that enhance survival and reproduction. B) decrease the number of individuals in any given population. C) lead to an increase in genetic drift. D) ...
Wednesday, December 7, 2011 by jon

Biology
what does this mean: the rate of blood flow to an organ is related to resistance to flow in the small arteries and arterioles
Wednesday, December 7, 2011 by Caroline

Biology
which of the following DNA sequences would likely be the most stable? (only one strand of the helix is shown) A) CCGAGGCCT B) CGTATAGGG C) CCCGGGGCC D) CTAAGCTTT E) ATATATATA I know the answer is c but why is that true?
Tuesday, December 6, 2011 by UCI Student

Biology
4)You count your cells and have 8x10ᶺ5 viable cells/ml you want to see (dilute the cells) to end up with 2x10ᶺ5 viable cells/ml. What volume of cells will you put into 20 ml?
Tuesday, December 6, 2011 by Daniel

Biology
1.The four rows of data below show the boiling points for a solution with no solute, sucrose (C12H22O11), sodium chloride (NaCl), and calcium chloride (CaCl2) (not in that order). Which boiling point corresponds to calcium chloride?
Tuesday, December 6, 2011 by Tre

Biology
can anyone tell me a little about MacArthur and Wilson's theory of island biogeography? I need to answer the question Describe a series of small habitats that exist within 10 to 20 kilometers of your house and which might be subject to MacArthur and Wilson's theory of ...
Tuesday, December 6, 2011 by Allie

biology
Aristotle's system of classification, which 2 animals would be grouped together? A, seagulls and lizards B.seals and bats c. snails and butterflies d. whales and fish thanks
Tuesday, December 6, 2011 by ann

biology
mammals are most closely related t : A, amphibians B. birds C. arthropods tks.
Tuesday, December 6, 2011 by ann

biology
please help me on true or false, i put false, according to natural selection, individual organisms can evolve new phenotpes in response to their environments.
Tuesday, December 6, 2011 by Anonymous

biology
6) If the DNA sequence is GTAC, what will be the mRNA sequence? a) CATG b) CTUT c) CAUG d) UCGG 7) Given the codon UGC, what will be its anticodon? a) ACG b) TCG c) TGC d) AAT
Tuesday, December 6, 2011 by mark

biology
a) What type of bond is involved in complementary base pairing? ----------------------------------------​---------------- b) On what site of the large ribosomal subunit does the second tRNA attach during translation? ----------------------------------------​...
Tuesday, December 6, 2011 by denis

biology
1) What is the complementary strand of the DNA sequence GCAAT? a) GGCTT b) CGTTA c) CGTAT d) GCUUA
Monday, December 5, 2011 by denis

science-biology
. Explain the biological logic of administering anti-Rh antibodies to Rh- mothers immediately after they give birth to an Rh+ baby?
Sunday, December 4, 2011 by israa

biology
Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning of enzymes in these organisms. Suggest some ways ectothermic organisms might cope with this problem.
Sunday, December 4, 2011 by John

Biology
Explain what happens during each of the three steps of cellular respiration and explain why a lack of oxygen is such a severe problem to the process.
Friday, December 2, 2011 by Seth

Biology
Using the fundamentals of thermodynamics, explain why we must continue to eat in order to maintain homeostasis?
Friday, December 2, 2011 by Seth

Biology
List and define the five characteristics that ALL living things share
Friday, December 2, 2011 by Anonymous

biology!!
why do Mountain dwellers have higher averages of hemoglobin than people living in coastal areas?
Friday, December 2, 2011 by lenny

science-biology
A family member recently found out her child's blood group was AB+ yet hers is O+. i'm suppose to explain this oddity but i don't know how? so please help me!!! thanks
Friday, December 2, 2011 by lenny

science-biology
A family member recently found out her child's blood group was AB+ yet hers is O+. i'm suppose to explain this oddity but i don't know how? so please help me!!! thanks
Friday, December 2, 2011 by lenny

Biology Expert needed
Here at Jiskha, we operate with volunteers to assist students. We are great need of a biologist or certified teacher in biology. If you are interested in this volunteer work, please indicated so at http://www.jiskha.com/contact/ thank you so much. Bob Pursley
Thursday, December 1, 2011 by bobpursley

biology
how many poeple prefer batteries than plugging a cable on the wall and why?
Thursday, December 1, 2011 by Anonymous

Biology Concepts
if tall (D) is dominant to dwarf (d0, and two homozygous varieties DD and dd are crossed, what kind of progeny will be produced?
Wednesday, November 30, 2011 by Janiece

biology
which of the following represents the F1 generation of a monohybrid cross of YY x yy parents? a)100%Yy b)75%Yy:25%YY c)25%Yy:75%yy d)100%yy
Wednesday, November 30, 2011 by denis

biology
a disease caused by a bb gene is said to be?
Wednesday, November 30, 2011 by denis

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 by Henry2

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 by Keya

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 by Jim

biology
divides the new plant cells in telophase
Monday, November 28, 2011 by kay

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 by Anonymous

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 by Dont delete the question

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 by Hae

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 by thomas

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 by Christina

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 by lola

biology
19. How does polygenic inheritance differ from Mendelian inheritance?
Wednesday, November 23, 2011 by lola

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 by Lisa

Biology
A relationship in which a single celled organisms live within the cells of another organism is called what?
Monday, November 21, 2011 by Anonymous

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 by jake

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 by jake

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 by Jimmy

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 by Josh

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 by Teddy

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 by Hae

Biology
Is urine normally found in bladder of fetal pig? Why or why not?
Wednesday, November 16, 2011 by Teddy

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 by Amy

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 by Jimmy

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 by JG

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 by addi

science - biology
What is the health advantage that can result in sickle cell hemoglobin?
Sunday, November 13, 2011 by Courtney

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 by Teddy

biology
Please help to write a assignment on the topic Biotechnological applications in agriculture and medicine .how to write it?
Sunday, November 13, 2011 by noor

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 by sara

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 by lola

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 by Henry2

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 by lola

Biology
What is the difference between beta and alpha glucose.
Wednesday, November 9, 2011 by Debe

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 by Sammie R

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 by Cassie

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 by Cassie

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 by Cassie

Biology
2) Why can it be said that each glucose molecule runs the Krebs cycle twice?
Tuesday, November 8, 2011 by Cassie

Biology
4) Explain why organisms do not violate the second law of thermodynamics?
Tuesday, November 8, 2011 by Cassie

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 by Peter

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

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 by Peter

Biology
How can you experimentally determine the total volume of blood in a human?
Sunday, November 6, 2011 by Jen

Biology
Two parents are blond haired and their children are blond haired. Why is this so?
Sunday, November 6, 2011 by Ruth

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 by Ruth

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 by Henry2

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 by Ruth

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 by Ruth

science-biology
why do we study the human organ system?
Saturday, November 5, 2011 by diana

biology
if offspring exhibit a 3:1 phenotype ratio, what are the genotypes of the parents?
Wednesday, November 2, 2011 by Adrian

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 by Jake

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 by mas

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 by blaire

biology
find a drug scandal within a sportig event and write some notes about it.
Tuesday, November 1, 2011 by lissa

biology
how reliable are tests for drugs in sport?
Tuesday, November 1, 2011 by lissa

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 by mas

Biology
Can genetic mutations also occur within mitochondria and cause diseases? if yes, how common are these diseases?
Monday, October 31, 2011 by Jen

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 by Mariana

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 by Catherine

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 by Catherine

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 by Catherine

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 by Catherine

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Homework Help: Science

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