Which of the following is not considered an intrinsic isolating mechanism?
A) sterile offspring
B) ecological isolation
C) geographic isolation
D) gametic incompatibility
E) timing of courtship display
Answer: D) gametic incompatibility
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A chemist adds a chemical to pure water and there is a 100 fold increase in the concentration of hydrogen ions. What is the best approximation of the new pH value?
A. 0 B. 5 C. 7 D. 9 E. 14
A trapping behavior where small worms are ensnared and then digested is found in some species of
which fungal phylum?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
Which of the following is true of Viagra? It
a. can cause hearing loss. b. can cause sudden headaches. c. can result in long sustained erections. d. is used to overcome complications due to circulatory problems. e. does all of these.
Match the reactant in the citric acid cycle on the left with the appropriate enzyme on the right
A) citrate synthase B) fumarate hydratase C) succinyl CoA synthetase D) aconitase E) malatase F) succinate dehydrogenase G) fumarate dehydrogenase H) malate dehydrogenase 1) oxaloacetate 2) malate 3) citrate 4) fumarate 5) succinyl CoA