The tough, pliable body of a lichen is called a(n) ____

a. soredium
b. arbuscule
c. thallus
d. sporangium
e. haustorium


ANSWER: c

Biology & Microbiology

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Genes located along the X chromosome:

A. have a full set of complementary alleles on the Y chromosome. B. are called X-linked genes. C. are contributed solely by the female parent. D. are always recessive to genes located on the Y chromosome.

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Increasing the flow of Na+ ions into a neuron at rest (-70 mV initially) would trigger

A. hyperpolarization. B. depolarization. C. repolarization. D. active transport. E. None of the choices are correct.

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Many marine organisms incorporate carbon into their shells. After they die, these shells become part of the ____

a. atmosphere b. sediment c. ocean d. ocean food web e. land food web

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Movement of individuals into or out of the population, called gene flow, impacts evolution of populations because

A) it can lead to extinction of one or more populations. B) it may cause genetic drift. C) it leads to a redistribution of alleles. D) adaptive radiation results. E) a founder effect will occur.

Biology & Microbiology