14C is a radioactive isotope, and it turns into ____________________ when it decays.

Fill in the blank(s) with the appropriate word(s).


nitrogen

Biology & Microbiology

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Tobacco mosaic virus is most commonly introduced into plants through small wounds caused by handling and by insects chewing on plant parts. What would prevent most viruses from easily entering plant cells?

A. the cell wall of the plant B. the plasma membrane of the virus C. the protein coat of the virus D. the cell wall of the virus E. the plasma membrane of the plant

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Herbicide resistance and Bt genes from GMO

crops are now commonly found in weeds. This is an example of

a. genetic drift. b. the bottleneck effect. c. gene flow. d. the Red Queen effect. e. disruptive selection.

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Amal has a serious metabolic disorder known as PKU. His sister has the same disorder. Neither of

Amal’s parents have the disorder. What is the most likely inheritance pattern of this disorder? A. Autosomal dominant B. Autosomal recessive C. X-linked dominant D. X-linked recessive E. It is not possible to tell the inheritance pattern from this information.

Biology & Microbiology

What do hydrolases catalyze?

a. splitting water b. oxidation-reduction reactions c. splitting a molecule using water d. the transfer of a phosphate group e. reactions in which double bonds are formed

Biology & Microbiology