how do reproductive barriers relate to the biological species concept?
a. Prezygotic barriers produce a new population of the same species, whereas postzygotic barriers produce new species.
b. Reproductive barriers prevent two populations from interbreeding, producing unique species.
c. Geographic barriers always separate two biological species.
d. Reproductive barriers lead to the extinction of one species, opening a habitat for a new species to occupy.
b. Reproductive barriers prevent two populations from interbreeding, producing unique species.
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Why is older climate data smoother when graphed than the present spikiness?
A) Climate was unusually steady millions of years ago. B) Each data point represents less years in the older data. C) Each data point represents more years in the older data. D) Both A and C
The frequency of reported tornadoes would be favored by all the conditions EXCEPT
A. north south mountain chains. B. proximity to a supply of warm moist air. C. sophisticated detection ability. D. upper level wind shear.
Changes in Earth's orbital configuration may lead to warming temperatures. These warming temperatures, in turn, may lead to the release of both CO2 and CH4. Increases in these gases may further warm the planet. This is an example of a
A) positive feedback loop. B) negative feedback loop. C) neither a positive or negative feedback loop.
Which of the following is NOT one of the four major religions for the Latin American region?
a. Judaism b. Christianity c. Roman Catholic d. Islam e. Animism