Which organism spends the greatest portion of its life cycle in a diploid phase?
a. plant
b. fungus
c. animal
d. algae
c. animal
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Meselson and Stahl relied on equilibrium density gradient centrifugation in a ________ solution to resolve the DNA containing 14N from the DNA containing 15N.
A) radiolabeled phosphate B) calcium chloride C) radiolabeled nitrogen D) sodium acetate E) cesium chloride
What is the difference between trans- and cis-acting regulatory factors? Design an experiment that allows you to prove your answer to the question
What will be an ideal response?
Most of the interior of a leaf consists of soft, thin-walled, living ________ cells
A) parenchyma B) collenchyma C) epidermal D) sclerenchyma E) guard
True or False: A cell's morphology provides general information on the cell's physiological capabilities
a. TRUE b. FALSE