Which letter in the accompanying figure represents the ovary in which haploid germ cells form by meiosis and gametes
form when these cells divide by mitosis?
a. A only
b. B only
c. C only
d. D only
e. both A and D
ANSWER: a
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Which of the following statements is true regarding the movement of water through the xylem of vascular plants? Select all correct choices
A. It is not uni-directional (e.g., can be transported both toward the leaves and roots). B. It depends on differences in turgor pressure. C. It may be the result of capillary action. D. It travels through vessel elements.
The fact that quantitative traits may be based on a polygenic basis was first discovered in studies of DDT resistance in Drosophila
Indicate whether the statement is true or false
Gel electrophoresis separates DNA fragments according to their ________.
A. charge B. length C. base sequences D. polarity
The physical home of a species is its ________
Fill in the blank(s) with correct word