Imagine an earthworm that has no chaetae. How would the lack of chaetae affect movement of the earthworm?
A. The earthworm would be much flatter than normal since it has no hydrostatic skeleton.
B. The earthworm would only be able to extend its body segments.
C. The earthworm would only be able to shorten its body segments.
D. The earthworm would have difficulty changing locations, since it cannot anchor itself in the soil.
E. The earthworm would not be able to move at all.
Answer: D
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Which of the following statements describes how root meristems differ from apical meristems in plants?
A. Cells in root meristems have determinate growth. B. Root meristems are shielded by a root cap that protects cells from abrasion by the soil. C. Cells in root meristems are adjacent to the zone of maturation. D. Cells in root meristems are stimulated by hormones other than auxin.
Which of the following is TRUE when comparing solutions with a pH of 6 and a pH of 8?
A. The solution with a pH of 8 has a 100 times higher concentration of hydrogen ions than a solution with a pH of 6. B. The solution with a pH of 8 has a 2 times higher concentration of hydrogen ions than a solution with a pH of 6. C. The solution with a pH of 8 has a 100 times lower concentration of hydrogen ions than a solution with a pH of 6. D. The solution with a pH of 8 has a 2 times lower concentration of hydrogen ions than a solution with a pH of 6. E. The hydrogen ion concentration does not appreciably differ between a solution with a pH of 8 versus that with a pH of 6.
A germline mutation passes from generation to generation because it occurs during the DNA replication before
A) mitosis. B) meiosis. C) fertilization. D) RNA replication.
Compared to freshwater fishes, marine fishes:
What will be an ideal response?