In 2012, the Midwest experienced unusually hot, dry conditions for long periods during the
summer months. As a result, many plants suspended or reduced their growth and
reproduction, which had major implications for agricultural crops such as corn. This response
to environmental conditions is called __________.
a. dormancy
b. hibernation
c. niche tradeoffs
d. both dormancy and niche tradeoffs
A
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A population of mostly ____ individuals with a ____ generation time and a ____ proportion of females is expected to
show the most growth in the future.
a. prereproductive; short; high b. reproductive; short; low c. reproductive; long; low d. postreproductive; long; low e. prereproductive; short; low
The most efficient lungs with respect to oxygen uptake are found in this group of vertebrates.
A. amphibians B. birds C. fish D. mammals E. reptiles
Which of the following virus structures contain the receptor sites that allow it to attach to specific sites on a cell?
a) capsule b) cell wall c) plasma membrane d) envelope e) nucleic acid core
Cytotoxic T cells have the ability to
A. produce platelets. B. increase erythrocyte production. C. produce antibodies. D. stimulate thrombin. E. destroy pathogens.