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Homework Help: Science: Biology

Recent Homework Questions About Biology

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biology
What effect does an increase or decrease in the pH of the cell cytoplasm have on proteins and their ability to function?
Sunday, January 22, 2012 at 3:56pm

English
I am doing a university application form where I am asked questions it asks: *Why are you interested in this program? (100 words or less) I applied for Biological Sciences-Major Human Biology. My question is, would it be ok if I talked about the major instead of general ...
Saturday, January 21, 2012 at 2:16pm

biology
A dominant gene A produces wire-haired texture in dogs. Its recessive aamllele a produced smooth hair. Cross the heterozygous wire-haired dog with homozygous smooth-haired dog. List the genotype and phenotype ratios of all the possible offspring.
Saturday, January 21, 2012 at 2:10pm

BIOLOGY
what is an hypothesis. a. a prediction b.a collection of data c.a possible explanation tha can be tested d. a controlled experiment. i think is d
Thursday, January 19, 2012 at 8:14pm

BIOLOGY
which of the follwing is best definition of science? A.a body of knwolege gathered throgh experiments. B.a process of accidental discorery. C. a search for answers to questions about the natural world. D. a method of asking testable questions based on hypothesis.
Thursday, January 19, 2012 at 7:44pm

BIOLOGY
Which of the following is the best definition of science.
Thursday, January 19, 2012 at 7:24pm

Biology
15.8 ml = how many Liters
Tuesday, January 17, 2012 at 8:39pm

Biology
The transport of blood by the combining of endothelial cells to form a capillary is an example of: An emergent property Natural selection Adaptation A population Asexual reproduction Is it Asexual reprod
Wednesday, January 11, 2012 at 10:57pm

English
Sometimes words appear as though they begin with a prefix when they actually do not. Each of the following word groups contains a word that looks as though it begins with a number prefix, but does not. Write the word that has no prefix in the blank at the right. 1.centipede,...
Wednesday, January 11, 2012 at 10:54pm

Biology
In an experiment designed to measure the distance a golf ball is hit by clubs made of different material, a standardized variable would be: A The distance the golf ball traveled B The type of material the club is made of C The material the golf ball was made of D The wind ...
Wednesday, January 11, 2012 at 10:18pm

Biology
The "Kingdom" is the most all inclusive taxonomic category True or False. I think it is true but not sure
Wednesday, January 11, 2012 at 9:53pm

Biology - Genetics
Please help me!!!! I need help with this practice test question. In Guinea pigs, the brown coat (B) is a dominant over the cream-coloured coat (b), and straight hair (H) is dominant over curly hair (h). Using a Punnett square, complete the cross between a heterozygous brown, ...
Tuesday, January 10, 2012 at 9:07pm

biology
What is the difference betwen RNA virus and Retrovirus?
Tuesday, January 10, 2012 at 7:46am

biology
What is the difference betwen RNA virus and Retrovirus?
Tuesday, January 10, 2012 at 7:45am

English
Everybody in my class got their paper work they have to do by the end of the week.I got mine too,so i would like you to help me with this :D? I got a paper with instructions: There are 8 students,each with different IQ.Those students recieved 10 medical books,(medical because ...
Tuesday, January 10, 2012 at 5:15am

biology
what is the correct pathway required for oxygen
Sunday, January 8, 2012 at 9:00pm

Human and Social Biology
A calorimeter was used to oxidise completely 2g of a food sample,causing a temperature rise of 5degrees C in 100cm3 of water(this figure includes the water equivalent of the apparatus). How much energy was present in the food sample(in joule per g)?
Sunday, January 8, 2012 at 8:00pm

biology
Which of the following is a function of modern-day psychologists? read tour thoughts study conformity study the future study how the positions of planets influence a person's personality
Thursday, January 5, 2012 at 11:48pm

biology
What does nt mean? biotechnology....is it nanotecnology or nuclear transfer??? or measurement?
Thursday, January 5, 2012 at 4:50pm

ap biology
The first step in making a protein is transcription of a gene. This occurs in the 1._______of a eukaryotic cell. An enzyme called 2.______ carrres out the process of transcribing RNA from the DNA. It starts at a specific nucleotide sequence called a 3.______ next to the gene. ...
Wednesday, January 4, 2012 at 5:46pm

Biology
what would b possible sources of errors for a potato experiment involving osmosis with potato going into salt solutions ( 50% and 25%) and also potato going into 100% distilled water?
Monday, January 2, 2012 at 2:03am

Biology
Cells absorbing sugar or other small molecules from their surroundings is an example of A. diffusion B.osmosis C. exocytosis D.endocytosis I think it is either C or D because they both have to do with the transportation of molecules in and out of cells.
Friday, December 30, 2011 at 12:43pm

Science Fair
I'm doing my science fair project on like how healthy and junk food affect the human body. I check on the site (Rockland Sit Fair) and reading the Project Categories. Does these project categories below relates to my project??? Medicine and Health: Study of diseases and ...
Thursday, December 29, 2011 at 5:42pm

Please help me!!! BIOLOGY
1. Explain how natural selection and sexual selection can work together to cause the evolution of large antlers on male moose. 2. Suggest two ways a synthetic biologist can change the course of evolution.
Wednesday, December 28, 2011 at 11:01pm

evolutionary machanism - BIOLOGY
A flock of migrating birds is blown off course by a storm and carried towards a small island that has no birds. Only three of the birds survive the storm and make it to the island. They start to reproduce and, after several years there are 500 birds on the island. Does the ...
Wednesday, December 28, 2011 at 10:02pm

Biology - Evolution
In one sentence each, describe a) one positive effect of direct artificial selection b) one negative effect of direct artificial selection c) one negative effect of indirect artificial selection
Wednesday, December 28, 2011 at 3:23pm

Biology
how do animals that live in different enviroments meet their need for efficent gas exhcange? I was thinking maybe through their respiratory system? Body surface, lungs , gills, any specialized organs ? Or though the environment they live in ?
Wednesday, December 21, 2011 at 11:31pm

Biology
Is predation (predators feeding on prey) the only form of species interaction that represents consumption?
Tuesday, December 20, 2011 at 3:49am

Biology
Do all living organisms undergo sexual reproduction?
Tuesday, December 20, 2011 at 3:32am

biology
what is the length of trecha in men
Monday, December 19, 2011 at 8:59pm

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 at 9:27am

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 at 3:45pm

biology
Is it normal for variation to occur within a group? Explain.
Monday, December 12, 2011 at 2:39pm

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 at 1:28pm

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 at 10:12pm

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 at 9:45pm

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 at 9:23pm

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 at 5:12pm

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 at 3:42pm

biology
Relationship between free energy change and metabolism in biological system
Friday, December 9, 2011 at 2:48am

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 at 8:05pm

Biology
explain the process of adaptive radiation, and how are reproductive barriers important to speciation
Thursday, December 8, 2011 at 2:04am

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 at 4:26pm

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 at 12:33pm

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 at 10:01pm

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 at 8:01pm

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 at 8:01pm

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 at 4:48pm

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 at 4:11pm

biology
mammals are most closely related t : A, amphibians B. birds C. arthropods tks.
Tuesday, December 6, 2011 at 4:07pm

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 at 10:05am

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 at 5:11am

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 at 5:07am

biology
1) What is the complementary strand of the DNA sequence GCAAT? a) GGCTT b) CGTTA c) CGTAT d) GCUUA
Monday, December 5, 2011 at 1:52pm

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 at 3:12pm

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 at 1:39pm

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 at 8:14pm

Biology
Using the fundamentals of thermodynamics, explain why we must continue to eat in order to maintain homeostasis?
Friday, December 2, 2011 at 8:11pm

Biology
List and define the five characteristics that ALL living things share
Friday, December 2, 2011 at 8:08pm

biology!!
why do Mountain dwellers have higher averages of hemoglobin than people living in coastal areas?
Friday, December 2, 2011 at 5:30am

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 at 5:00am

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 at 4:48am

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 at 7:29pm

biology
how many poeple prefer batteries than plugging a cable on the wall and why?
Thursday, December 1, 2011 at 1:36pm

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 at 10:44pm

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 at 2:25pm

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

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