Cloning mammals has proven to be:
a. impossible.
b. easy and straightforward.
c. not technically feasible at the present time.
d. a technique that produces many similar-looking, deformed progeny.
e. a process with a low success rate and a high incidence of genetic defects.
e
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While fishing, a biology student makes the following observations:
1) Water spiders appear to be able walk on the surface of the water. 2) Flat rocks may be made to skip across the water. Which of the following properties of water can explain these observations? A) Water is an excellent solvent. B) Water molecules create spheres of hydration around solute molecules. C) Water molecules are cohesive. D) Water molecules are often associated via hydrogen bonds. E) both choices C and D
Based on the taxa in the picture, which type of habitat is this?
A) fast stream B) slow stream C) pond D) marine
Bacteria typically have _______, whereas eukaryotes have _______.
a. one chromosome that is circular; many chromosomes that are linear b. several chromosomes that are circular; many chromosomes that are linear c. one chromosome that is linear; many chromosomes that are circular d. two chromosomes that are circular; eight chromosomes that are linear e. None of the above
A scientist develops a new medication that is a protein compound and that must be administered by injection. Which of the following would be the most effective and safest means of preparing a sterile solution of the new medication?
A. autoclaving B. filtration C. dilution with alcohol D. lyophilization E. ultraviolet irradiation