Photosynthetic organisms serve as the base for most food chains in the biosphere.
Answer the following statement true (T) or false (F)
True
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Life history patterns of guppies in Trinidad are a result of which natural selection force?
a. Competition differences in different streams. b. Predation differences in different streams. c. Temperature differences in different streams. d. Pollution differences in different streams. e. Salt concentration differences in different streams.
What is a population viability analysis (PVA), and what predictions does it allow population biologists
to make?
What will be an ideal response?According to a variety of gene data, which hypothesis is correct?
A. the Multiregional Hypothesis B. the Recently-Out-of-Africa Model C. Both the choices are correct. D. Neither choice is correct.
One major function of the kidneys is water conservation. What portion of the nephrons is responsible for that function when water is lacking in the diet?
A. collecting duct B. loop of Henle C. glomerulus D. Bowman's capsule