Animals exchange heat with their environment through
A. radiation.
B. conduction.
C. convection.
D. evaporation.
E. All of the choices for this question are correct.
E. All of the choices for this question are correct.
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Where are a mollusk’s gills located?
a. within the visceral mass b. under the foot c. in the mantle cavity d. surrounding the radula
Which of the following terms best characterizes catabolite repression associated with the lac operon in E. coli?
A) negative control B) constitutive C) repressible system D) positive control E) inducible system
During DNA replication, deoxyribonucleosides are added to the 5' end of Okazaki fragments and to the 3' end of the leading strand.
Answer the following statement true (T) or false (F)
Which substance induces "bolting," the rapid elongation of a plant stem?
A) a gibberellin B) abscisic acid (ABA) C) ethylene D) phytochrome