Adaptive radiation is demonstrated by ____
a. the dinosaurs going extinct
b. coelecanths remaining similar over hundreds of millions of years
c. the evolution of mammals after dinosaurs went extinct
d. rats and resistance to warfarin
e. warbler body mass and survival
ANSWER: c
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Scanning tunneling electron microscopes create a three-dimensional image of specimens at atomic level resolution.
Answer the following statement true (T) or false (F)
Over many generations man has chosen certain desirable characteristics in dogs by allowing dogs possessing those characteristics to reproduce. In this way, 150 breeds of dogs, all the same species, have descended from wolves. This process is referred to as
A. convergent evolution. B. natural selection. C. inheritance of acquired traits. D. artificial selection.
Four of the five answers listed below are related by a common polluting action. Select the exception
a. power generated by coal b. power generated by water c. power generated by oil d. power generated by gas e. use of motor vehicles
Many freshwater invertebrates eliminate ammonia by...
a) simple diffusion across the skin b) simple diffusion across the gill membranes c) converting it to uric acid and eliminating it with solid wastes d) converting it to urea and eliminating it in their urine