Stabilizing selection reduces genetic and phenotypic variation and increases the frequency of intermediate phenotypes
a. True
b. False
ANSWER: True
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In the DNA strand above, if the daughter cells
contain the sequence GACTAGTAAACCG after replication, they would be
a. recessives. b. mutants. c. dominants. d. co-dominant. e. twins.
Why is the energy generated from the catabolism of sugars and other macromolecules ultimately harnessed to generate ATP?
A. ATP synthesis is an exergonic reaction B. ATP can be used to make RNA, which is an energy storage molecule in the cell C. ATP is required to generate the proton gradient in the intermembrane space of mitochondria D. ATP can be used by cells to drive endergonic reactions
Which of the following is not true of type III hypersensitivity?
A. Serum sickness is a systemic response. B. It involves an immune complex reaction. C. Antigen-antibody complexes are deposited in the basement membrane of epithelial tissues. D. It involves production of IgE antibodies. E. The Arthus reaction is a local response.
In 1938, scientists found a population of coelacanths in the Indian Ocean. This fish species is considered a "living fossil" and appears not to have changed morphologically for 80 million years. This discovery supports the ________ model of evolution.
A. punctuated equilibrium B. common descent C. gradualism D. natural selection E. adaptation