The dynamics of an ecosystem depends on two
main processes:
a. the cycling of energy and the unidirectional
flow of nutrients.
b. the unidirectional flow of energy and the
cycling of nutrients.
c. the multidirectional flow of both energy
and nutrients.
d. the unidirectional flow of both energy and
nutrients.
e. the cycling of both energy and nutrients.
B
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Which of the following is considered a peptide hormone?
a. estrogen b. epinephrine c. thyroxine d. insulin
The greatest cause of extinction of species is
a. runoff. b. habitat loss. c. invasive species. d. evapotranspiration.
Which list describes the correct sequence of events involved in cell signaling?
a. signal transduction, reception, signal transmission, response b. response, signal transduction, signal transmission, reception c. signal transmission, signal transduction, reception, response d. reception, signal transmission, response, signal transduction e. signal transmission, reception, signal transduction, response
How does ecological economics provide a more realistic approach than neoclassical economics?
A. Ecological economics recognizes that certain raw materials are non-renewable. B. Ecological economics eliminates the cost-benefit analysis approach. C. Ecological economics is based on the concept of the "invisible hand". D. Ecological economics attempts to consider the value of ecosystem services. E. Both A and D are correct.