A photoreceptor in seeds detects the ratio of red to far-red light, preventing seeds from germinating when:
A. it is too warm.
B. it is too cold.
C. they are in the shade of another plant.
D. they are in direct sunlight.
E. it is too dry.
C
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Optimal protection of specimen, personnel, and environment is accomplished with which class of biological safety cabinet?
a. Class I b. Class II c. Class III d. Class IV
Four elements make up more than 96% of the mass of most living organisms. Which of the following
is NOT one of those four elements?
a. sodium b. carbon c. oxygen d. nitrogen e. hydrogen
Natural selection acts directly on the genotype of an organism
_______ Indicate whether the statement is true or false.
NADP+ is required for photosynthesis because it _____.
a. helps produce ATP from the light reactions b. absorbs light energy c. forms part of photosystem II d. is the primary electron acceptor e. forms NADPH to be used in the Calvin cycle