Plant secondary compounds are chemicals that
a. have no known metabolic function in the plant.
b. are required for enzyme function.
c. are generally carbohydrates or proteins.
d. are important in cell division.
b
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In general, the cold-dwelling thaumarchaeotes are evolving more slowly than the hyperthermophilic crenarchaeotes
Indicate whether the statement is true or false.
Ribozymes are enzymes
Indicate whether the statement is true or false.
Which of the following would not be a "control" in an experimental procedure?
A. a normal group B. an experimental group C. a known standard of comparison D. a placebo group E. a "zero-value" group
Which most completely describes the circumstances under which yarrow will alter its phenotype?
A. Temperature, soil conditions, and water conditions B. Soil conditions only C. Being produced by sexual versus asexual reproduction D. Water conditions only E. Asexual reproduction, soil conditions, and water conditions