Which of the following represents a prezygotic barrier to reproduction?
a. hybrid sterility
b. hybrid breakdown
c. behavioral isolation
d. hybrid inviability
e. hybrid weakness
C
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Which of the following is used in the production of buttermilk and cheese?
A. Enterococcus faecalis B. Streptococcus pneumoniae C. Lactococcus lactis D. Streptococcus mutans
Could an isolated melanin granule move along an actin microfilament?
A. Yes, melanin granules have motor proteins. B. Yes, motor proteins all use ATP to cause a conformation change. C. No, motor proteins are specific for the type of filament they bind. D. Answers a and b are both correct.
Approximately ________ million years ago the amniotes branched off from their amphibian ancestor
a. 300 b. 250 c. 355 d. 180 e. 425
Somatic pain is associated with all of the following structures except ________
a. joints b. tendons c. skin d. skeletal muscles e. stomach