__________, such as jellyfishes, corals, and sea anemones, are radially symmetrical. Fill in the blank(s) with the appropriate word(s)


ANSWER: Cnidarians

Biology & Microbiology

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The complete second signal for B cell activation requires which of the following interactions?

A) CD40-CK40L interaction B) cytokine-cytokine receptor interaction C) TH-B cell interaction D) All of these are necessary.

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The scientific name for the Golden crayfish is Orconectes luteus. The correct name of the genus for this fish is

A. Orconectes luteus. B. Orconectes. C. luteus. D. O. luteus. E. Orconectes l.

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What is thought to help explain the evolution of the blood clotting mechanism?

a. constant mutations b. direct response to environmental factors c. gene duplication d. sharing of gene pools between species e. inbreeding

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What cells are key players in only the humoral response?

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