In angiosperms, an unusual reproductive process involving two sperm cells occurs, called
A. self-pollination.
B. germination.
C. pollen tube formation.
D. double fertilization.
Answer: D
Biology & Microbiology
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Which of the following types of organisms lacks a nervous system?
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When the left ventricle contracts, blood moves into the:
a. aorta b. pulmonary artery c. left atrium d. superior vena cava e. pulmonary circuit
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Morphological divergence ____
a. is the change in body form from that of a common ancestor b. is the change in body form to resemble that of an ancestor c. implies no change in body form over time d. does not occur in related species e. only occurs in unrelated species
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How many codons are in the following sequence of nucleotides: AAAUGCUCGUAA?
A) 1 B) 3 C) 4 D) 6 E) 12
Biology & Microbiology