A plant species where each plant can only make either male or female flowers is called a ____ species and always has

____ flowers.



a. monoecious; complete
b. dioecious; imperfect
c. dioecious; complete
d. monoecious; imperfect
e. monoecious; perfect


ANSWER: b

Biology & Microbiology

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Prior to the Mesozoic Era, the primary photosynthesizers in the ocean were the cyanobacteria and the diatoms

A. true B. false

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The ? helix contains ______________ amino acids residues per turn. One full turn of the ? helix is ______________ long

A. 5.4, 3.6 Å B. 36, 54 Å C. 3.6, 5.4 Å D. 5.4, 1.5 Å E. 3.6, 1.5 Å

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Which of the following would be considered to be a symplesiomorphy of mosses, ferns, conifers, and flowering plants?

Given the following list of characteristics:



A. Chlorophylls a & b.
B. Vascular tissue.
C. Seeds.
D. Flowers.
E. Both flowers and vascular tissue.

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An antibody molecule consists of a total of

a. two polypeptide chains. b. four polypeptide chains. c. two polysaccharide chains. d. four polysaccharide chains. e. four phospholipids chains.

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