Which of the following is a reactant of the Calvin cycle?
a. carbon dioxide
b. glucose
c. oxygen
d. water
a. carbon dioxide
Biology & Microbiology
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Small circular, extrachromosomal DNA segments are known as _______.
A. vectors B. plasmids C. clones D. RNA
Biology & Microbiology
A special structure on certain cyanobacteria for nitrogen fixation is called a(n):
a. ammonia cyst. b. homocyst. c. heterocyst. d. nematocyst. e. pneumatocyst.
Biology & Microbiology
Which of the following types of muscles are striated?
A. Skeletal and smooth B. Skeletal and cardiac C. Cardiac only D. Skeletal, smooth, and cardiac E. Triceps and biceps only
Biology & Microbiology
Which of the following countries has the most
extensive family-planning program? a. United States b. Brazil c. China d. Japan e. Pakistan
Biology & Microbiology