Which term is based on the Greek root words for "laws" of "classification"?
A) species, genus, family, class, phylum
B) taxonomy
C) homeostasis
D) nomenclature
E) hypothesis
Ans: B) taxonomy
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You examine cells with a microscope and detect two Barr bodies in each cell. What is the most likely genotype of the cells?
A) XX B) XY C) XO D) XXY E) XXX
The northern elephant seal was hunted almost to extinction during the 18th and 19th centuries. Less than 100 seals were left to contribute to the gene pool of their future generations. Since the early 20th century, the elephant seals have been protected by law in both the U.S. and Mexico. Over 100,000 seals now inhabit the western shores of North America, all related to the small population that survived the slaughter of hunters.Scientists fear the elephant seals may be more susceptible to disease and pollution due to
A. founder effect. B. disruptive selection. C. heterozygous advantage. D. bottleneck effect.
Suppose this experiment was repeated two weeks in a row. Each time the same person was the hand scrubber and the procedure was repeated exactly the same. Would you expect the number and kinds of microorganisms present in the first hand scrub (A) or the last hand scrub (E) to be similar from week to week?
A) I would expect the number and kinds of microorganisms present in the first hand scrub (A) to be similar from week to week. B) I would expect the number and kinds of microorganisms present in the last hand scrub (E) to be similar from week to week. C) Neither choice (scrub A or scrub E) would be similar from week to week.
The ________ nervous system cannot be controlled by conscious thought.
A. autonomic B. central C. motor D. voluntary