Which of the following strategies enable non-acidophilic bacteria to endure lower pH environments?
A. Proton pumps that pump H+ out of the cell
B. All of the choices are correct.
C. Presence of internal buffers
D. Synthesis of acid shock proteins that protect other cellular proteins
Answer: B
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Campylobacter jejuni is transmitted to humans by all of the following EXCEPT
A. anal-oral sexual activity. B. insect vectors. C. contaminated food and water. D. infected animals.
A special structure on certain cyanobacteria for nitrogen fixation is called a(n):
a. ammonia cyst. b. homocyst. c. heterocyst. d. nematocyst. e. pneumatocyst.
Which progression represents the correct hierarchy of organization in the human body?
a. cells ? tissues ? organ systems ? organs b. cells ? tissues ? organs ? organ systems c. tissues ? cells ? organs ? organ systems d. tissues ? organs ? cells ? organ systems e. tissues ? cells ? organ systems ? organs
An increase in root pressure will result in the rapid release of abscisic acid (ABA) and the subsequent opening of the stomata.
Answer the following statement true (T) or false (F)