The ratio of net productivity at one trophic level to net productivity at the trophic level below it is known as:
1.Ecological efficiency
2.Harvesting efficiency
3.Assimilation efficiency
4.Production efficiency
1
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Which of the following represent repeated sequences commonly found in the human genome? (Choose all that apply)
A. several thousand base pair sequences in tandem B. several thousand base pair sequences dispersed throughout the genome C. two or three base pair sequences repeated many times in a row D. two or three pase pair sequences dispersed throughout the genome
The most common source(s) of infection in the central nervous system (CNS) is(are):
a. hematogenous spread. b. infections at other sites such as otitis me-dia. c. organisms gaining access because of ana-tomic defects in CNS structures. d. bacteria that are able to travel along nerves leading to the brain.
Interspecific competition is a density-independent factor
Indicate whether the statement is true or false
Both ATP and NADPH are required for
A. neither the light reaction nor the Calvin cycle. B. the light reaction only. C. electron transport through the thylakoid membrane. D. both the light reaction and Calvin cycle. E. the Calvin cycle only.