How small is the smallest object that can be seen with a light microscope?
a. 2 µm
b. 0.2 µm
c. 2 nm
d. 0.2 nm
b
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Recall that Clements's view of biological communities is that of a highly predictable and interrelated structure, while Gleason's view of biological communities is that individual species operate independently
If we set up many identical sterilized ponds in the same area and allowed them to be colonized, what should we predict if we wished to test Gleason's hypothesis? A) Identical plankton communities will develop in all ponds. B) Similar plankton communities will develop in all ponds. C) Different plankton communities will develop in all ponds. D) Limited plankton communities will develop in all ponds. E) Initially the number of species in each pond will be greater than the number normally found in similar environments.
The study of DNA sequences indicates that the evolution of new functions for proteins typically occurs ________.
a. after gene duplication b. after genetic drift c. before gene duplication d. during gene flow
Which important finding from the fossil record supports the theory of evolution?
a. Life has evolved over time. b. All life evolved in the ocean. c. Most species are actually extinct. d. There is an inaccuracy in the fossil record. e. Ancient species greatly differed from those alive today.
________ were the first plants that did not require water for transferring sperm to eggs
A) Bryophytes B) Gymnosperms C) Ferns D) Angiosperms