Which of the following is(are) shared by both prokaryotic and eukaryotic cells?

a. cell wall
b. nucleus
c. cytoplasm
d. organ systems


C

Biology & Microbiology

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_____ is the stimulus for phototropism

a. Red light c. Green light b. Far-red light d. Blue light

Biology & Microbiology

The extra energy required to destabilize existing chemical bonds and to initiate a chemical reaction is called:

A. exergonic energy B. catalytic energy C. kinetic energy D. endergonic energy E. activation energy

Biology & Microbiology

A carnivore, such as a lion, that mainly eats herbivores, such as zebras and wildebeests, would be placed at which trophic level?

What will be an ideal response?

Biology & Microbiology

What first happens to the two-carbon molecule, acetyl CoA, as it enters the Krebs cycle?

A. It joins with pyruvate to form a four-carbon sugar. B. It joins with another acetyl CoA molecule to form a six-carbon sugar. C. It is reduced to form carbon dioxide. D. It is activated with a phosphate from ATP. E. It is combined with a four-carbon sugar to form a six-carbon sugar.

Biology & Microbiology