At what checkpoint(s) does the cell arrest in response to DNA damage?
A. G1/S
B. G2/M
C. spindle
D. G1/S and G2/M
E. G2/M and spindle
D. G1/S and G2/M
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In a vertebrate, which of the following is NOT
a part of the axial skeleton?
a. skull b. ribs c. vertebrae d. knee e. tail
Stabilizing selection occurs when
a. the environment controls which organisms will survive. b. humans determine which organisms will survive.
c. the extremes of the population have a lesser chance to survive. d. the extremes of the population have a better chance to survive. e. the organisms on one extreme of the population have a better chance to survive than those on the other extreme.
During electron transport which ions accumulate in the outer compartment of the mitochondria?
1.hydrogen 2.oxygen 3.iron 4.sodium 5.zinc
The body fluids of an osmoconformer would be _____ with its _____ environment
A) isoosmotic; freshwater B) hyperosmotic; saltwater C) isoosmotic; saltwater D) hypoosmotic; saltwater