Every living organism must have ____

a. at least one cell
b. a nucleus
c. a cell wall
d. mitochondria
e. oxygen


ANSWER: a

Biology & Microbiology

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The size range of most plant and animal cells is ________.

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All of the following statements concerning the evolutionary species concept are true EXCEPT

A. an evolutionary "family tree" is used to identify species based on a common ancestor. B. it relies on identification of certain morphological traits to distinguish one species from another. C. abrupt changes in traits are indicative of the evolution of a new species in the fossil record. D. it requires that the members of a species share a distinct evolutionary pathway.

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Of the phage listed below, which creates mutations in its host genome via transposition?

A) lambda B) M13 C) Mu D) T7

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The genes that determine the development of limbs in lizards as opposed to snakes are called hox

genes.

Indicate whether the statement is true or false.

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