Which statement is TRUE?
a. The laws of thermodynamics do not apply
to living organisms.
b. Producers in ecosystems have the highest
concentrations of energy.
c. The energy available to do cellular work
will exist forever.
d. The amount of energy available to
consumers is more than that available to
producers.
e. When plants trap energy, they convert it
into light.
B
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What type of plant would be least affected by the loss of the guard cell function that closes stomata?
A. A desert plant. B. A plant from the plains of the American midwest. C. A rainforest plant. D. A poisonous plant. E. A carnivorous plant.
Endosperm tissue of angiosperms has what ploidy level?
A. n B. 2n C. 3n D. 4n E. 8n
Wilkins and Franklin studied the structure of DNA using ____
a. molecular scale models of nucleotides b. X-ray diffraction c. computer-assisted graphics d. electron microscopy e. light microscopy
What molecule is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?
a. NADH b. FADH2 c. ATP d. CoA e. oxaloacetate