Cytoplasmic extensions by which some protozoa move are
A. cilia.
B. flagella.
C. pseudopodia.
D. All answers are correct.
E. pili.
Ans: C. pseudopodia.
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The process of meiosis results in ____
a. the production of four identical cells b. no change in the chromosome number from parental cells c. a doubling of the chromosome number d. a reduction in the chromosome number e. two diploid cells
How are clades different from traditional Linnaean taxonomic groups?
a) clades contradict classification by kingdoms b) clades group organisms by visible similarities only c) clades make comparisons of organisms gene by gene d) clades focus on derived characters
Explain why an organism that carries on aerobic metabolism has an advantage over an organism that uses anaerobic metabolism
What will be an ideal response?
Under which of the following evolutionary explanations for disease does antagonistic pleiotropy fall?
a. Natural selection has not had time to catch up with environmental changes. b. Natural selection lacks foresight; we are stuck with historically contingent relics of the past. c. Natural selection favors reproductive success, even at the expense of vulnerability to disease. d. Some disease symptoms, though unpleasant, are actually beneficial.