Why are most bryophytes less than 10 cm tall?
A. They lack a cuticle.
B. They are seedless.
C. They have underdeveloped stomata.
D. The have conducting cells instead of tracheids.
E. They have no H2O transport mechanisms.
Answer: D
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Many marine and freshwater bony fish achieve osmoregulation via _____
A) loss of water through the gills B) gain of salt through the gills C) loss of water in the urine D) no drinking of water E) gain of water through food
Meiosis may pause at which point in the cycle?
a. after DNA is replicated in S phase but before meiosis I begins b. after meiosis I is complete c. after prophase II d. before telophase II e. after prophase I
The weakest symbiotic association, in which one
species simply lives better in the presence of another species is a. commensalism. b. competitive exclusion. c. mutualism. d. facultative obligate mutualism. e. parasitism.
The drug cytochalasin B blocks the function of actin. Which of the following aspects of the cell cycle would be most disrupted by cytochalasin B?
A) spindle formation B) spindle attachment to kinetochores C) cell elongation during anaphase D) cleavage furrow formation and cytokinesis