The order Lactobacillales within Firmicutes are also called the lactic acid bacteria, because these bacteria
A) can aerobically catabolize lactic acid.
B) can ferment lactate.
C) produce lactate.
D) uniquely require lactic acid as a precursor for cell wall biosynthesis.
Answer: C
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Which of the following choices is a proximate cause of the non-combative behavior of male African
cichlids that do not hold territories?
a. Cichlids can detect and store information about aggressive encounters. b. The GnRH-producing neurons in the hypothalamus are small. c. The testes produce no testosterone. d. GnRH production is high. e. Noncombative behavior allows the male to build his strength for a takeover attempt on a territory.
Gastric bypass surgery is effective in part
because it
a. increases ghrelin levels. b. decreases ghrelin levels. c. increases leptin levels. d. decreases leptin levels. e. increases ghrelin levels and decreases leptin levels.
How did Meselson and Stahl rule out the conservative model of DNA replication using equilibrium density gradient centrifugation?
What will be an ideal response?
he logistic equation:a
models a J-shaped growth curve. b. takes into account the carrying capacity of the environment. c. predicts continued exponential growth. d. would characterize the uncontrolled growth of a population. e. models a K-shaped growth curve.