If there is life on another planet within our galaxy, why would we expect to learn that this life would probably use the same narrow range of wavelengths of the electromagnetic spectrum as we do for a source of energy and information?

a. because all life must use the same electromagnetic spectrum by definition
b. because of the fundamental aspects of photon energy and light absorption
c. because this is the same wavelength that hits the Earth
d. because there is no other wavelength available in nature


Ans: b. because of the fundamental aspects of photon energy and light absorption

Biology & Microbiology

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The process of evolutionary changes that result in formation of new species and groups of species is called

A. temporal evolution. B. artificial selection. C. macroevolution. D. serial evolution. E. a combination of temporal and serial evolution.

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Ultraviolet light can cause permanent changes in genes. These changes are called

a. mutations. b. enzymes. c. fibrin. d. promoters. e. polypeptides.

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The following nutrient most associated with

eutrophication is: a. iron. b. hydrogen. c. oxygen. d. carbon. e. phosphate.

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Scientists have a complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger, as ancestors of the modern horse adapted from living in forest to grasslands. This is an example of

A. punctuated equilibrium. B. extinction. C. a postzygotic barrier to evolution. D. gradualism. E. a prezygotic barrier to evolution.

Biology & Microbiology