Why is the biological concept of natural selection so important to geography?
What will be an ideal response?
Answer: Natural selection favors individuals and species best suited to living in the environmental conditions of a particular area. Because this goes on consistently, species might to adapt to environment changes or migrate to more favorable conditions. Some species will not adapt and become extinct. This profoundly affects what animals and plants live in which locations and, thus, their geographic distributions.
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Burl and Paul have a total weight of 1300 N. The tensions in the supporting ropes of the scaffold they stand on add to 1700 N. The weight of the scaffold itself must be
A. 600 N. B. 400 N. C. 800 N. D. 500 N.
How can a half-life be used to tell the age of a sample?
A. The ratio between the radioactive form and stable form varies regularly with time. B. The amount of radioactive form depends on the amount of radiation in the surroundings. C. The half-life of an isotope is constant. D. The ratio between the radioactive form and the stable form depends on the archaeological record. E. both C and D
Blue northers
A) involve mP air. B) involve mT air. C) cause severe thunderstorms. D) are most frequent in late spring and early summer. E) none of the above
One of the primary goals of geology is to ________
A) understand the history of the earth B) understand the role of plate tectonics in the earth's evolution C) determine the role of meteorites in the decline of species over time D) develop a comprehensive relationship between fossils and geologic formations E) identify all of the rocks on the surface of the earth