Which of the following best describes semiconservative replication?
a. The translation of a DNA molecule into a complementary strand of RNA.
b. A DNA molecule consists of one parental strand and one new strand.
c. The number of DNA molecules is doubled with every other replication.
d. The replication of DNA never takes place with 100% accuracy.
e. The replication of DNA takes place at a defined period in the cell cycle.
B
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Describe the interactions between genes and the environment in the sex determination of some reptiles; explain their relevance to human sex determination
What will be an ideal response?
A fly is attracted to a symphony conductor’s
a. hand movements. b. sounds of the moving baton. c. organic matter on the conductor’s nose. d. black bow tie. e. white shirt.
If the environment surrounding a cell has a lower concentration of solute than the cell, the
A. environment is hypotonic to the cell. B. environment is isotonic to the cell. C. cell will die. D. cell will not experience a net gain or loss of water. E. environment is hypertonic to the cell.
Which of the following is true regarding some insect tracheal systems?
A. They are associated with the blood circulatory system. B. They excrete body wastes as well as transport gases. C. Their spiracles function like stomata in plants, opening for gas exchange and closing to conserve water. D. The tracheal tubes are continually open in large terrestrial insects. E. They contain respiratory pigments to enhance oxygen transport.