A genes expressed at a relatively constant level in tissues regardless of variations in the animal's condition is called a
A. transposable element.
B. steady state gene.
C. constitutive gene.
D. recombinant gene.
E. multifunctional gene.
C. constitutive gene.
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In order for a species to be successfully reintroduced into an area,
a. hunting must be restricted. b. populations of the animals cannot be too small. c. suitable habitat must be maintained. d. all of these
Males and females often differ in their reproductive strategies due to the fact that males can increase the number of
offspring they produce by ____ while females reproduce most successfully by ____.
a. mating with a high-quality female; mating with a high-quality male b. driving off other males; defending a productive territory c. defending a productive territory; enlisting multiple males to aid in raising her offspring d. mating with multiple females; mating with a high-quality male e. mating with multiple females; mating with multiple males
Through evolution, the hindlimbs of cetaceans have been modified, eventually becoming
a. flippers. b. tail. c. non-existent. d. flukes. e. enlarged.
Why are endospores used to measure the effectiveness of autoclave sterilization?
A) Endospores are easy to store in the lab until needed. B) Endospores are very simple structures and easy to detect. C) Endospores are very hard to kill. D) Endospores are composed of all the molecules found in living cells. E) Endospores of different bacteria are destroyed at different temperatures and can be used to calibrate autoclave temperatures.