A skeleton that consists of a fluid-filled closed chamber that muscles act against is called a(n) ________
a. hydrostatic skeleton
b. cytoskeleton
c. exoskeleton
d. endoskeleton
a
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Despite great diversity, all vertebrates share which basic homeostatic mechanism(s)?
a. digestion only b. metabolism only c. respiration only d. digestion and metabolism e. digestion, metabolism and respiration
At the molecular level, how do proteins like repressors bind to DNA? How can binding affinities be increased or decreased?
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You are maintaining a small population of fruit flies in the laboratory by transferring the flies to a new culture bottle after each generation. After several generations, you notice that the viability of the flies has decreased greatly
Recognizing that small population size is likely to be linked to decreased viability, the best way to reverse this trend is to _____. A) cross your flies with flies from another lab B) reduce the number of flies that you transfer at each generation C) transfer only the largest flies D) change the temperature at which you rear the flies