During early interphase the structure of a eukaryotic DNA chromosome is
A) a single continuous linear double helix.
B) a double helix undergoing semiconservative replication.
C) a double helix undergoing conservative replication.
D) single-stranded.
A) a single continuous linear double helix.
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The process of gene duplication and divergence refers to (select all that apply):
A. creating new genes via mutation in duplicates of old genes. B. the creation of gene families, which are genes that are similar across a range of organisms. C. offspring becoming increasingly different from their ancestors. D. the creation of new species as new genes are created from duplicates of old genes. E. None of the answer options are correct.
In competition between P. caudatum and P. bursaria, neither species goes extinct because they utilize different resources. This can be considered as evidence for
A. the extinction theory. B. character displacement. C. the coexistence hypothesis. D. the competitive exclusion principle. E. resource partitioning.
Which process results in the creation of mRNA?
A) Replication B) Transcription C) Translation D) All of the above
How are the membranes of animal cells in winter able to remain fluid when the weather becomes extremely cold?
a. The percentage of both unsaturated phospholipids and cholesterol increases. b. The percentage of saturated phospholipids in the membrane decreases. c. The percentage of unsaturated phospholipids in the membrane decreases. d. The percentage of cholesterol molecules in the membrane increases.