The mate-attracting elaborate plumage of the male peacock is a result of:
A) genetic drift. B) adaptation to the environment.
C) gene flow. D) sexual selection.
Answer: D
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How is the chromosome of a bacterial cell replicated?
a. The linear DNA molecule is replicated from multiple origins of replication bidirectionally. b. The linear DNA molecule is replicated from one origin of replication bidirectionally. c. The circular DNA molecule is replicated from multiple origins of replication bidirectionally. d. The circular DNA molecule is replicated from one origin of replication bidirectionally. e. The circular DNA molecule is replicated from one origin of replication unidirectionally.
The correct sequence of increasing organizational complexity is
A. organ, tissue, cell, organ system, organism. B. organism, tissue, cell, organ system, organ. C. tissue, cell, organ system, organism, organ. D. cell, tissue, organ, organ system, organism. E. cell, organ, organ system, tissue, organism.
A seed has three parts: an embryo, a source of food for the developing embryo called ________, and a protective cover.
A. antheridium B. ovule C. rhizoid D. endosperm E. cone