Which one of the following terms applies to the phylum Mollusca?  

A.  protostome
B.  pseudocoelomate
C.  Parazoa
D.  diploblastic
E.  asymmetry


A.  protostome

Biology & Microbiology

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The receptors to which animal virus attachment proteins usually bind are

A. proteins. B. carbohydrates. C. nucleic acid. D. lipids. E. glycoproteins.

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Once the lac repressor binds to the lac operator site, RNA polymerase is prevented from transcribing the

A. galactosidase gene. B. regulatory gene. C. galactoside transacetylase gene. D. galactosidase and galactoside transacetylase genes. E. galactosidase and regulatory genes.

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UV radiation will stimulate the skin cells to produce a molecule that will be converted into ________

a. folate b. vitamin A c. vitamin D d. vitamin B e. niacin

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Flowers frequented by insects are typically not ________ because insects cannot detect this color.

A. red B. white C. yellow D. blue

Biology & Microbiology