When a vesicle moves along microtubules toward the center of the cell, the molecular motor(s) _____ are used?
A. dynein
B. both kinesin and dynein
C. Molecular motors are not required for movement along microtubules.
D. kinesin
A. dynein
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Which statement is not true of the zygospore-forming fungi?
(a) They are in the phylum Zygomycota. (b) Ascospores are found in an ascus. (c) Rhizopus is a representative genus. (d) A zygospore is formed after fertilization.
Scientists measured the pressure in the xylem of redwood trees at different heights and found that the higher they made their measurements, the lower the pressure. They extrapolated this to a pressure of zero, and concluded that the tallest a tree could grow is 122–130 meters. The tallest known tree on Earth is 112.7 meters. What assumption were the scientists making to conclude that when pressure was zero, the plant could grow no further?
A. Turgor pressure would be greater than gravity. B. Transpiration would be less than uptake of water from the xylem. C. Leaves above that point would not receive any sunlight. D. Leaves above that point would not receive any water. E. Stems above that point could not transport sugars in their xylem.
Chromatids
What will be an ideal response?
A cline is:
a. a temporal gradient in the frequency of genotypes and phenotypes. b. a spatial gradient in the frequency of genotypes and phenotypes. c. an area of resource competition. d. an area of assortative mating.