What feature is LEAST characteristic of a virus?
a. contains DNA or RNA genetic material
b. contains cytoplasm and ribosomes
c. has a protein coat
d. can only replicate inside a living host cell
e. is very small
ANSWER: b
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Snuppy, a male Afghan hound, was created by transferring the nucleus from an ear cell of the male Afghan, Tai, into an enucleated egg from a donor. The embryo was transplanted into a surrogate mother to develop to term
Which of the following animals would be a genetic match for Snuppy if nuclear DNA were tested and if Snuppy were not a clone, but the product of in vitro fertilization? A) Tai B) the egg donor C) the surrogate D) both Tai and the egg donor E) both Tai and the surrogate
The Coppolino standard is ________
A) a method for determining paternity B) set to follow federal rules 402, 403, and 404 C) a means to allow controversial new scientific testing to be used in court if the foundation is solid D) using methods that are tested and have gained general acceptance from the scientific community E) a method that requires pretrial hearings to occur for scientific evidence
Which of the following statements about the evolution of life histories is correct?
A) Stable environments with limited resources favor r-selected populations. B) K-selected populations are most often found in environments where density-independent factors are important regulators of population size. C) Most populations have both r- and K-selected characteristics that vary under different environmental conditions. D) The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities. E) K-selected populations rarely approach carrying capacity.
The selective movement of specific small molecules and ions into excretory system tubules is
a. reabsorption. b. release. c. filtration. d. secretion. e. diffusion.