Phototropism is a plant response controlled largely by which color of light?
A. Red.
B. Blue.
C. Violet.
D. Green.
E. None of the choices is correct.
B. Blue.
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Flowering can be regulated by light, temperature, gibberellin levels, or internal factors. What do all of these different flowering pathways have in common?
A. All four pathways result in a decrease in LEAFY (LFY) expression, which induces flowering. B. All four pathways result in an increase in CONSTANS (CO) expression, which induces flowering. C. All four pathways result in an increase in LEAFY (LFY) expression, which induces flowering. D. All four pathways result in a decrease in CONSTANS (CO) expression, which induces flowering.
What is the fundamental structural unit of life on Earth?
What will be an ideal response?
Prey, such as lemmings, may have a density-dependent effect on predator populations, such as those of the snowy owl, by enabling the predator to increase the number of its offspring at high prey densities
Indicate whether the statement is true or false
A molecular clock for evolution is based on
A. fossil records of organisms. B. cellular structures of organisms. C. nucleotide sequences in the genomes of organisms. D. enzymatic activities of organisms.