During replication, each parent DNA strand serves as a ________ for synthesis of new DNA strands.
A. scaffold
B. reservoir
C. copy point
D. template
E. comparison molecule
Answer: D
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____ are cells that lay the framework for new phloem and xylem in vascular plants. Prior to the differentiation of these cells, their precursors transported auxin out of immature leaves
Fill in the blank with the appropriate word.
Due to character displacement, two closely related species may differ most morphologically when they
A. are allopatric. B. are sympatric. C. occupy the same niche. D. occupy different niches. E. share a common ancestor.
In pine trees the megaspores develop within a(n) ____
a. sporopollenin b. ovule c. seed d. strobilus e. pollen grain
Why are flowcharts useful for dichotomous keys?
a. They allow the researcher to visualize relationships between different bacteria. b. They allow the researcher to get the answer without having to do many tests. c. They provide a map to the answer.