In the figure above, which of the following survivorship curves most applies to humans living in developed countries?
A) curve A
B) curve B
C) curve C
D) curve A or curve B
Answer: A
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In what kind of environment are fossils most likely to form?
A. desert B. tropical rainforest C. tundra D. shallow lake bed E. fast flowing creek
Progressive changes in the fossil record are evidence for evolution because
A. they show gaps in the fossil record. B. they show descent with modification. C. they show evolutionary change at the level of the individual. D. they show inheritance of acquired characteristics.
Which of the following characteristics or actions is associated with a steroid hormone?
A. cyclic AMP B. activation of proteins present in an inactive form C. the second messenger D. production of new proteins E. binding of a protein to a surface receptor on the plasma membrane
All but which of the following are good barriers to invasion by microbes?
a. mucous membranes b. eye secretions c. broken skin d. urine e. gut bacteria