Each cell is able to maintain a constant internal
environment. This condition is called
a. metabolism.
b. homeostasis.
c. physiology.
d. adaptation.
e. evolution.
Answer: b
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An activator is present and results in the increase in transcription of the target gene. This is an example of _______________
A. termination B. positive control C. negative control D. feedback inhibition
A fruit that develops from several ovaries in a single flower, such as a raspberry, is called a(n) ____
a. aggregate fruit b. accessory fruit c. multiple fruit d. simple fruit e. compound fruit
Night blindness, dry skin, and skin infections are typical symptoms of
A. beriberi. B. scurvy. C. rickets. D. vitamin A deficiency.
A scientist is studying endosymbiosis in cells. This means she is investigating
A. how mitochondria and chloroplasts evolved into eukaryotic cells. B. how mitochondria and chloroplasts evolved into prokaryotic cells. C. how mitochondria and chloroplasts were derived from eukaryotic cells. D. how mitochondria and chloroplasts were derived from prokaryotic cells.