Positive feedback control occurs
A) during maintenance of proper body temperature.
B) when insulin and glucagon regulate blood glucose levels.
C) during the process of childbirth (labor).
D) to counter the effects of negative feedback.
E) in other animals but not in humans.
C
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The gene sequence of the p53 protein illustrates
A. near complete dissimilarity of gene sequence between organisms yet shows a similarity in function for a protein. B. greater similarity within closely related groups, but differences from other groups. C. evolutionary relatedness of primates, other mammals, birds, and fish. D. greater similarity within closely related groups, but differences from other groups and evolutionary relatedness of primates, other mammals, birds, and fish are correct. E. no connection between any of the nine animals and their p53 gene sequence.
Pure water has a water activity value of
A. 1.00. B. 0.80. C. 0.70. D. 0.90.
Which term refers to muscles that are attached to bones, and cause bones to move at their joints when they contract?
A. smooth muscles B. skeletal muscles C. cardiac muscles D. ligament tissues E. involuntary muscles
Which of the following statement is TRUE?
A. Endospores allow a cell to attach to surfaces within the host. B. Endospores are extremely resistant structures that can survive high temperatures. C. Endospores are used by bacteria for reproduction (binary fission). D. One bacterial cell produces manyendospores.