Using structural characteristics to differentiate species on the basis of key physical characteristics is called the 

A. morphological species concept.
B. fitness concept.
C. gene frequency concept.
D. biological species concept.


A. morphological species concept.

Biology & Microbiology

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Antigen-presenting cells present antigens to

A) B lymphocytes. B) T lymphocytes. C) dendritic cells. D) neutrophils.

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Okazaki are found on the ____ strand of DNA

Fill in the blank with the appropriate word.

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What will be an ideal response?

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An EPSP is an example of a(n) graded potential

____________________ Indicate whether the statement is true or false.

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