Which of the following statements about biological clocks is false?
a. They are limited to vertebrates.
b. They are regulated by clock proteins that act both within and outside the nervous system.
c. They have complex feedback loops.
d. They are controlled by genes.
e. They are capable of sustaining biological rhythms independently of environmental cues.
A
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Based on the tree shown above, a grouping composed of Species A, Species, B and Species D only is considered:
A. paraphyletic. B. polyphyletic. C. monophyletic. D. sister groups. E. None of the of the answer options is correct.
A high therapeutic index is
A. more toxic to the patient. B. less toxic to the patient. C. has no effect on the patient. D. has no effect on the pathogen
Why do organisms molt their exoskeleton and grow new ones periodically?
What will be an ideal response?
Creating conditions in the laboratory that promote the growth of some microbes while inhibiting the growth of others is called
A) complex culturing. B) reducing conditions. C) enrichment culturing. D) transport conditions. E) differential culturing.