The seasonal cessation of activities accompanied by a reduction in metabolism in response to cold temperatures during winter is called
A) hibernation.
B) torpor.
C) heterothermy.
D) diapause.
A
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Compounds of tin, mercury, arsenic, and copper are no longer used to prevent microbial growth in cooling water primarily because
A. antibiotics are cheaper. B. other chemicals were shown to be much more effective. C. microbes developed resistance to these metals. D. their use contributes to serious pollution of natural waters. E. All of the choices are correct.
In a eudicot seed, which structure emerges
first?
a. embryonic shoot b. embryonic root c. coleoptile d. cotyledons e. the embryonic root and shoot emerge at the same time
If a DNA sequence is ATC, what is the sequence in the molecule produced during transcription?
a. UAG b. TAG c. ATC d. AUG e. AUC
In what general way are regulons regulated?
A) Regulons can be under both positive or negative control. B) Regulons are under negative control exclusively. C) Regulons are under positive control exclusively. D) Global regulation of regulons depends on the regulatory guidance of RNA polymerase II. E) Regulons are regulated by feedback translation loops.