Thursday
August 28, 2014

Homework Help: Science: Biology

Recent Homework Questions About Biology

Post a New Question | Current Questions

Biology
Describe how you would prepare 10 mL each of 2 M, 1.5 M, and 1 M NaCl solutions from a 2 M stock NaCl solution. Describe your actions–exactly what you would do –step-by-step–when preparing this solution. Also show all calculations. Be sure all amounts include ...
Wednesday, June 5, 2013 at 5:36pm

biology
wer can i get synthetic plant hormones
Saturday, June 1, 2013 at 12:19pm

Biology
How does the structure of Earth’s interior affect seismic waves?
Friday, May 31, 2013 at 3:10am

biology
Alkaptonuria results when an individual has no functional HGD enzyme. Without functional HGD, breakdown of excess tyrosine stops at homogentisate. The accumulated homogentisate is polymerized by the enzyme polyphenol oxidase to a complex set of molecules called “...
Tuesday, May 28, 2013 at 7:16am

Biology
What is the defferent of prokaryotic and eukaryotic cells
Monday, May 27, 2013 at 4:44pm

BIOLOGY!!!!!!
What is the reletive amounts of mRNA that will e transcribed if there is no promoter and enhancer?
Wednesday, May 22, 2013 at 5:33pm

biology urgent
Glucose is transported into a cell through a process of co-transport, where it is moved against its concentration gradient through a membrane channel. Moving any molecule against its concentration gradient requires energy, but these glucose channels do not require ATP or any ...
Tuesday, May 21, 2013 at 8:55am

Sociology of Sports
Would Someone PLEASE HELP? 1.Deviant overconformity is associated with some forms of violence in sports. The roots of this violence are grounded in (d) A. a desire for self-fulfillment and personal satisfaction. B.a lack of loyalty to team rules. C.the desire to gain ...
Saturday, May 18, 2013 at 1:47pm

biology
ap biology lab -what barriers might hinder the acquisition of plasmids
Friday, May 17, 2013 at 10:28am

bio
I am doing the biology ap bacteria DNA transformation lab and I came up with a transformation efficiency of 150,000. I read somewhere that they should be between 2,000-8,000. is my answer way off? My group counted an average of 1529 colonies to begin with so i dont see how the...
Friday, May 17, 2013 at 10:15am

Biology
I need help in tying 3 things from: cellular respiration, energy transfer, osmosis, ATP to the water cycle
Thursday, May 16, 2013 at 8:51pm

biology
For each of these restriction enzymes, determine whether or not the enzyme would cut the normal, Mutant A, Mutant B, or Mutant C DNA sequences described in part (g) and select your answers in the table below:
Wednesday, May 15, 2013 at 6:49pm

biology department
Approximately how many mL of 5% BaCl22H2O solution would be required to precipitate all the sulfate if we assume that your samples are pure sodium sulfate? Assume that the density of the barium chloride solution is 1.00 g/mL
Wednesday, May 15, 2013 at 2:33pm

biology
4.3kj of heat energy stands for how many burgers ?
Tuesday, May 14, 2013 at 10:57am

biology
A researcher develops a new drug that kills cells by preventing transcription. The most direct effect of the drug is to prevent cells from? A. making new DNA. B. exporting substances to the cytoplasm. C. making protein. D. breaking down substances in the cytoplasm.
Monday, May 13, 2013 at 4:57pm

biology
The nonliving matrix of the connective tissue through which the blood cells freely flow is the? A. plasma B. extracellular fluid. C. intracellular fluid. D. submucosa
Monday, May 13, 2013 at 3:12pm

biology
The scientific binomial name of a species is Canis vulpis. Which of the following is true? A. the species belongs in the family Canis. B. the species belongs in the genus vulpis. C. the species belongs in the genus Canis. D. the species belongs in the family vulpis.
Monday, May 13, 2013 at 3:02pm

Biology
What causes mutations in bacteria? and Can mutations affect plasmids?
Monday, May 13, 2013 at 1:20pm

Biology
Consider the close-up view of a segment of DNA undergoing transcription from left to right. Transcription begins at and includes the G/C base pair shown in bold green type.
Saturday, May 11, 2013 at 11:02am

Biology
How does the changes in the DNA code from CTT to CAT in the beta chain of haemoglobin affect cell activity?
Monday, May 6, 2013 at 9:35am

Biology
If a normal man marries a normal woman whose father was colourblind, what are the chances that their sons and daughters will be colourblind? Colourblindness is a sex-linked trait that affects males more often than females. With the aid of a Punnett square, indicate the ...
Sunday, May 5, 2013 at 2:55pm

Biology
Once blood picked up nutrients from the small intestine, it must pass through the liver via the inferior vena cava. Explain the importance of this pathway.
Sunday, May 5, 2013 at 2:27pm

Biology
Once blood picked up nutrients from the small intestine, it must pass through the liver via the inferior vena cava. Explain the importance of this pathway.
Sunday, May 5, 2013 at 1:28pm

Biology
An individual with blood type O receives type A blood. The phenomenon is agglutination. Can explain more?
Sunday, May 5, 2013 at 12:39pm

Biology
true or false if an organism randomly develops a feature that gives it a survival advantage, then it will be more likely to survive than other organisms, and will also be more likely to produce offspring which also have this advantageous feature. Eventually, many organisms ...
Sunday, May 5, 2013 at 9:12am

biology
To produce human protein X in bacterial cells, the plasmid (vector) that is chosen should have a _______________ promoter, and the source DNA should be ___________________. Which of the following best completes the sentence above? strong, wild type genomic strong, mutant ...
Thursday, May 2, 2013 at 2:51am

biology
Alcanivorax is a naturally occurring oil-degrading marine bacterium that can quickly become the predominant microbe in oil-contaminated open oceans and coastal waters. To identify the genes important for the oil-degrading ability, you could attempt the following: 1) You might ...
Thursday, May 2, 2013 at 2:50am

biology
A plasmid (vector) designed for use in bacterial cells is different from a plasmid (vector) designed for use in yeast cells. Listed below are three DNA features found on both plasmid types. If the DNA sequence of each feature could be the same on the two different plasmids, ...
Thursday, May 2, 2013 at 2:50am

biology
A common first step in the making of a DNA library is to obtain DNA from many of your chosen organisms and cut this source DNA with a restriction enzyme. It is likely that some genes will contain sites for the chosen restriction enzyme, and in this case, your DNA library will ...
Thursday, May 2, 2013 at 2:49am

biology
Hemoglobin is a critical oxygen-carrying protein. The protein functions as a tetramer with two α-globin subunits and two β-globin subunits. Individuals homozygous for a specific single point mutation in the region that encodes the sixth amino acid in β-globin ...
Thursday, May 2, 2013 at 2:43am

biology
Consider the following 45 base-pair (bp) DNA sequence: 1 10 20 30 40 | . | . | . | . | . 5’-CGCACCTGTGTTGATCACCTAGCCGATCCACG​GTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||​||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGC​CACCTAGGTTCCG-5&#...
Thursday, May 2, 2013 at 2:42am

statistics
Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better relative to the rest of...
Wednesday, May 1, 2013 at 10:25pm

biology
1. Which of the following statements does not describe a difference between the DNA of prokaryotes and the DNA of eukaryotes ? a.prokaryotic DNA is shorter and less complex than eurkaryotic DNA b. Prokaryotic DNA chains have two nucleotides, eukaroyotic DNA has four. c. ...
Wednesday, May 1, 2013 at 8:28pm

Biology Raynaud's Disease
Hey im doing a powerpoint presentation on this raynaud's disease, and could someone please give me some good sites to go through to get info abt this and please mention anything you know about the raynaud's disease as well, thanks.
Tuesday, April 30, 2013 at 11:51pm

Biology
1. Bone is formed from the deposition of __________ into connective tissue A. Calcium and Phosphate B.Sodium and potassium C. potassium and calcium D. Sodium and Phosphate E Actin and myosin 2. The major disadvantage of exoskeletons is A. Animal outgrows it B. it is not ...
Tuesday, April 30, 2013 at 5:24pm

Biology
Which of these systems is involved in connecting one body system with another? A. Integumentary B.Muscular C. Immune D. Digestive E. Endocrine I think its E
Tuesday, April 30, 2013 at 12:10pm

biology
1. The function of the circulatory system is to: A. Deliver oxygen and nutrients to every cell B. facilitate communication between different tissues c. Remove Wastes from tissues d. all of these e.none of these I believe the answer is D all of them
Tuesday, April 30, 2013 at 12:05pm

Biology
Is 9th grade biology hard? Is it interesting...?? I love life science but I just wondering if 9th grade biology hard??? I'm taking biology next year.
Monday, April 29, 2013 at 7:48pm

Biology
In lactic acid fermentation, ______ is _______ a) lactate...oxidized b) pyruvate...reduced c) ethanol...oxidized d) NAD+...oxidized e) NADH...reduced
Sunday, April 28, 2013 at 8:48pm

biology
TRUE OR FALSE all mutations in a gene would have an effect on the protein encoded by that gene. please help! :)
Saturday, April 27, 2013 at 3:10pm

Biology
The term "worm" is a description of a body shape. A worm had a long, thin body. Aew all worms in the same phylum? How do you know?
Friday, April 26, 2013 at 7:08pm

math
A textbook store sold a combined total of 462 biology and chemistry textbooks in a week. The number of biology textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?
Wednesday, April 24, 2013 at 9:38pm

Biology
you are studying a single-gene locus with two alleles in a population that is in Hardy-Weinberg equilibrium. Examination of a large sample of individuals from the population reveals there are six times as many heterozygotes as there are homozygote recessive individuals in this...
Tuesday, April 23, 2013 at 6:47pm

biology
In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self-fertilization—with selection for high, ...
Tuesday, April 23, 2013 at 6:45pm

Biology immediate help! please!
Need help please don't understand these questions. Dihybrid Genetic Crosses for Corn. A. What are the two hypotheses that you made about the allelic frequencies of progeny produced by the crosses: P x P? P F1 x F1? F B. Based on what you know about phenotypes and Figure 2...
Monday, April 22, 2013 at 2:40pm

Biology
When making comparison of sequences where some are whole genome sequences while others are partial genome sequences, or a specific glycoprotein sequence, How is it that we are able to make comparisons from these sequences if they all have different lengths?
Sunday, April 21, 2013 at 5:37pm

Biology
How many daughter cells will one cell have after 3 complete meiosis processes? Answer A) 8 B) 12 C) 16 D) 64
Sunday, April 21, 2013 at 4:14pm

Biology
even in multicell organisms (ex: animals) events which occur in individual cell may have profound effects on their entire organism.
Thursday, April 18, 2013 at 5:36pm

Biology
even in multicell organisms (ex: animals) events which occur in individual cell may have profound effects on their entire organism. Prove this with detail
Thursday, April 18, 2013 at 11:57am

Biology
even in multicell organisms (ex: animals) events which occur in individual cell may have profound effects on their entire organism. Prove this with detail
Wednesday, April 17, 2013 at 5:41pm

biology/chemistry
Determine the net ATP production from one molecule of acetyl CoA through the citric acid cycle and taking the products through oxidative phosphorylation?
Wednesday, April 17, 2013 at 3:07pm

BIOLOGY please help!!
Negative allosteric effectors in the citric acicd cycle. Theres four: I have NADH and ATP What are the other two please help
Wednesday, April 17, 2013 at 3:07pm

biology help
What are the regulatory enzymes regulated in the citric acid cycle?
Tuesday, April 16, 2013 at 11:16pm

biology
What are four negative allosteric effectors in the citric acid cycle
Tuesday, April 16, 2013 at 10:09pm

biology
i am researching an article and am having trouble understanding the title. can someone please explain to me in simple terms: Deficiency of a Beta-arrestin-2 signal complex contributes to insulin resistance. so what is a beta arrestin 2 signal complex?
Monday, April 15, 2013 at 1:21pm

Biology
Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
Sunday, April 14, 2013 at 10:06pm

statistics
An economist wants to estimate the mean income for the first year of work for college graduates who majored in biology. How many such incomes must be found if the economist wants to be 95% confident that the sample mean is within $500 of the true population mean? Assume that ...
Sunday, April 14, 2013 at 9:41pm

Biology
Dephosphorylation in the transuction process needs: A) protein kinases B) protein phosphatases C) single sugar like glucose D)cabohydrate
Sunday, April 14, 2013 at 6:59pm

Biology
PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of years ago did ...
Sunday, April 14, 2013 at 4:39pm

Biology
Fish have a two chambered heart called a single loop. Discuss the benefits and drawbacks of this system.
Sunday, April 14, 2013 at 4:13pm

Biology
Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians like frogs have from fish.
Sunday, April 14, 2013 at 4:13pm

Biology
Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen from the lungs) and ...
Sunday, April 14, 2013 at 4:12pm

Biology
Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?
Sunday, April 14, 2013 at 4:12pm

Biology
Programmed cell suicide occurs when internal or external signals go through _____ processes. Answer a)reception b)transduction c)response d)all of the above
Saturday, April 13, 2013 at 7:38pm

science-biology
Some herbicides, such as 2, 4-D are believed to make plant cells divide more rapidly than normal. Why would this kill plants? Why might this be dangerous to humans if it had the same effect on human cells?
Saturday, April 13, 2013 at 3:19pm

human and social biology
how long does inhaling during exercise take ? and how long exhaling during exercise take ?
Saturday, April 13, 2013 at 2:30pm

BIOLOGY
WHAT IS ASHMA?
Saturday, April 13, 2013 at 10:11am

Biology
Consider this pathway: signaling ligand ¨ G protein-coupled receptor ¨ G protein ¨ adenylyl cyclase ¨ cAMP. Identify the second messenger. Answer: A)G protein B)GTP C)adenylyl cyclase D)cAMP
Friday, April 12, 2013 at 3:35pm

Biology
Humans have about 20,000 genes in our genome. Explain how cells differentiate into different kinds of cells even though they have the same set of 20,000 genes in their nuclei, so they are genetically identical.
Friday, April 12, 2013 at 11:39am

Biology
The body of multicellular animals (salamanders, frogs and so on) is made of more than hundred different kinds of somatic cells. Even though they’re so different, they all have the same genome (the same DNA, the same set of genes). This is called genomic equivalence. How ...
Friday, April 12, 2013 at 11:26am

Biology
Through the process of spermatogenesis __________ sperm are created, whereas oogenesis creates ________ egg(s) and _________ polar bodies.
Thursday, April 11, 2013 at 4:08pm

biology
Which one of the following statements would most clearly refer to a person's genotype?
Wednesday, April 10, 2013 at 7:25pm

math
on a biology test a student answers 25 questions correct but doesnt pass. on second attempt he gets 37 correct. what is the percent of increase
Wednesday, April 10, 2013 at 3:56pm

Biology
Which of the following cranial nerve nuclei is a branchial motor nucleus and is, therefore, found in an intermediate position in the brainstem tegmentum? oculomotor nucleus abducens nucleus dorsal motor nucleus of vagus Edinger-Westphal nucleus nucleus ambiguus
Wednesday, April 10, 2013 at 10:34am

Biology
What type of cell in the central nervous system play an important role in the uptake and processing of neurotransmitters from synaptic clefts? neuron oligodendrocyte microglia endothelial cell ependymal cell
Wednesday, April 10, 2013 at 10:33am

Biology
Which of the following arteries contributes to the anterior circulation of the brain? anterior inferior cerebellar artery basilar artery anterior cerebral artery vertebral arteries superior cerebellar artery
Wednesday, April 10, 2013 at 10:32am

Biology
As should be clear from reviewing the midsagittal plane through the brain, which statement below most accurately describes the components of the ventricular system and/or the circulation of cerebrospinal fluid (CSF)? CSF flows directly from one lateral ventricle through an ...
Wednesday, April 10, 2013 at 10:31am

Biology
Theme A: Surface anatomy of the brain Of the following pairs of directional terms, which pair contains terms that define PERPENDICULAR (orthogonal) directions when applied to the identified region of the central nervous system? in the brainstem, ventral & anterior in the ...
Wednesday, April 10, 2013 at 10:30am

Biology
In conventional human radiological imaging (e.g., MRI, PET, CT) of the head, the axial plane is synonymous with the horizontal plane. Which of the following statements about this plane is most accurate? The axial plane is an axis of symmetry in the forebrain. The long axis of ...
Wednesday, April 10, 2013 at 10:29am

biology/ help please
which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon
Monday, April 8, 2013 at 10:10pm

biology/ help please
which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon
Monday, April 8, 2013 at 6:47pm

Math
John has 4 math books, 6 biology books,, and 8 statistics books to arrange on a shelf. In how many ways can he arrange the books so that books on the same subject are grouped together?
Sunday, April 7, 2013 at 5:24pm

Biology HELP
How would the production of gelatinase help a pathogen be more virulent?
Sunday, April 7, 2013 at 5:05pm

biology
(d) Is this pedigree consistent with sex-linked dominant inheritance? Yes No If you chose "yes", answer questions (i) and (ii) and leave parts (iii) and (iv) blank. If you chose "no", leave parts (i) and (ii) blank and answer questions (iii) and (iv). i) If...
Sunday, April 7, 2013 at 9:02am

biology
(c) Is this pedigree consistent with sex-linked recessive inheritance? Yes No If you chose "yes", answer questions (i) and (ii) and leave parts (iii) and (iv) blank. If you chose "no", leave parts (i) and (ii) blank and answer questions (iii) and (iv). i) ...
Sunday, April 7, 2013 at 9:02am

biology
(b) Is this pedigree consistent with autosomal dominant inheritance? Yes No If you chose "yes", answer questions (i) and (ii) and leave parts (iii) and (iv) blank. If you chose "no", leave parts (i) and (ii) blank and answer questions (iii) and (iv). i) If ...
Sunday, April 7, 2013 at 9:01am

biology
Consider the pedigree below. This pedigree represents a family with a rare genetic disease. Note two very important assumptions: Individuals who marry into the family may carry a disease allele. The disease is completelely penetrant. That is, any individual with a genotype ...
Sunday, April 7, 2013 at 9:00am

biology - environmental
How does the edge (shoreline) of a marsh/wetland affect the wetland? Would it be better for the wetland to have a round or broken shoreline? Are coves, peninsulas and islands important to have? How does the shape affect wave action and exposure to wind?
Saturday, April 6, 2013 at 8:21pm

biology
90% if the released energy during the Krebs Cycle comes from what
Saturday, April 6, 2013 at 4:20pm

Biology
a mother carried the sex-linked gene for color blindness and the father had normal color vision, what would be the probability of having a colorblind son? *using a Punnett Square
Saturday, April 6, 2013 at 1:26am

Biology
What are some of the treatments for coronary artery disease?
Friday, April 5, 2013 at 11:07am

Biology
Explain what happens when a person with AB+ donates blood to a patient with A+ blood type?
Friday, April 5, 2013 at 10:58am

Biology
Explain the role of white blood cells in the body's defense against foreign substances.
Friday, April 5, 2013 at 10:50am

Biology - URGENT Enzyme Lab
Did a catalase producing hydrogen peroxide lab, used manganese dioxide, fresh frozen liver, potato, ice, fine clean sand, etc. Basically just added hydrogen peroxide to the catalysts under diff conditions and stuff. Just dont get this question which is : how do you account for...
Friday, April 5, 2013 at 1:25am

maths literacy,biology,tourism,business studies
what possible careers could i get into with these subjects
Thursday, April 4, 2013 at 1:02pm

Biology
I'm doing a lab for gel electrophoresis and we added the digests in the wells of the agarose gel Lane 2 – λ Hind III (a standard) Lane 4 – Tube 1 Lane 5 – Tube 2 Lane 6 – Tube 3 Lane 7 – Tube 4 Now will DNA in tube 1 which only has dh20, 10x ...
Tuesday, April 2, 2013 at 2:11pm

Biology "Genetics"
Red-green Color Blindness and Hemophilia A are both sex-linked traits in humans. Both genes are on the X-chromosome and are tightly linked. Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a hemophiliac. Individual ...
Tuesday, April 2, 2013 at 9:39am

biology
) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table by giving the four ...
Tuesday, April 2, 2013 at 5:51am

biology
how do chromosomes move inside a cell during each stage of cell division?
Sunday, March 31, 2013 at 9:03pm

biology
Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a hemophiliac. Individual 6 is the as yet unborn son of 4 and 5. What is the probability that their son, 6, will be both color blind and a hemophiliac? Express your ...
Sunday, March 31, 2013 at 5:48pm

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members