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

Biology & Microbiology

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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

Biology & Microbiology

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.

Biology & Microbiology

During electron transport which ions accumulate in the outer compartment of the mitochondria?

1.hydrogen 2.oxygen 3.iron 4.sodium 5.zinc

Biology & Microbiology

The body fluids of an osmoconformer would be _____ with its _____ environment

A) isoosmotic; freshwater B) hyperosmotic; saltwater C) isoosmotic; saltwater D) hypoosmotic; saltwater

Biology & Microbiology