Why are veins less elastic than arteries?
What will be an ideal response?
ANSWER: When blood enters the arteries, it is traveling fast and with a great deal of pressure. The
arteries must have a lot of elasticity so that they can swell and recoil as a response to the
pressure exerted by the blood flow. By the time blood enters veins, the pressure is greatly
dissipated and not as much elasticity is required.
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If an organism has four copies of each chromosome, then it is
A. aneuploidy. B. diploid. C. haploid. D. tetraploid. E. polyploidy.
cIn the spiral staircase model of DNA, the handrails
are a. covalent bonds. b. hydrogen bonds. c. nucleotide base pairs. d. phosphate and deoxyribose groups. e. composed of all of these.
Will is a graduate student working in a microbiology lab. He is given the task of characterizing a newly discovered nitrogen fixing bacterium. What type of tests or observations will help him determine whether it is a member of the Cyanobacteria, alphaproteobacteria, or gammaproteobacteria?
What will be an ideal response?
Varicella and herpes zoster are caused by the same virus.
Answer the following statement true (T) or false (F)