The border across which genes can flow between two populations is called the
a. contact zone.
b. parapatric zone.
c. zone of speciation.
d. demilitarized zone.
e. zone of polyploidy.
a
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The primary germ layers develop from the
A) placenta. B) embryonic disc. C) uterus. D) morula.
If the innate immune response is not effective in neutralizing a threat, what form of immune response occurs next?
a. production of antibodies by T cells b. phagocytosis by neutrophils c. natural killer cells respond to sites of inflammation d. antigen detection by antibodies e. phagocytosis of MHC markers
Humans perceive the taste sensations of
a. sweet. b. salty. c. bitter. d. umami. e. all of these.
The paramecium discussed in class contained an organelle called the contractile vacuole. This is the presumed precursor of the:
A. Heart B. Kidney C. Liver D. Mouth E. Answer not on this list