An excess number of chromosomes in a gamete results from 

A. mutation.
B. nondisjunction.
C. crossing-over.
D. fertilization.
 


B. nondisjunction.

Biology & Microbiology

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Energy is carried from the light reactions to the Calvin cycle by __________.

A. water B. ATP C. NADP+ D. oxygen E. CO2

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The medicinal leech, once used to withdraw "unhealthy" blood from patients, produces ____________ to ensure blood flow from the host?

A.  antibiotics B.  antibodies C.  anticoagulants D.  blood clots E.  suture material

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Which of the following populations exhibits a type III curve?

1.A 2.B 3.C

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Which hormone allows muscle cells to store glucose?

a. growth hormone b. estrogen c. insulin d. glucagon e. testosterone

Biology & Microbiology