What evidence did Gause and MacArthur find for the competitive exclusion principle?
What will be an ideal response?
Gause displayed the competitive exclusion principle by putting two species of Paramecium with the same niche in a flask; as a result, the more adapted species survived and the less adapted one died. MacArthur observed that five North American warblers share an Eastern spruce tree for food and shelter and reduce competition by limiting overlap of their niches, demonstrating resource partitioning.
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Prokaryotes
A. lack a true nucleus. B. lack true DNA. C. use the cell membrane rather than ribosomes for making proteins. D. contain numerous organelles. E. are relatively benign cells incapable of harming organisms.
Which substance is not capable of diffusing across the endothelial cells of a capillary? a. Carbon dioxide b. None are capable of diffusing across the endothelial cells
c. All are capable of diffusing across the endothelial cells. d. Small lipid soluble molecules e. Oxygen
A population that is divided into several local populations among which individuals occasionally disperse (emigrate
and immigrate) is known as a: a. metapopulation. b. life table. c. survivorship curve. d. source population. e. sink population.
For an atom to be considered an ion:
A) protons can outnumber neutrons. B) neutrons can outnumber protons. C) protons can outnumber electrons. D) protons equal electrons.