Which of the following is found in both archaeal and eukaryotic genomes?
A) chromatin fibers
B) histones
C) heterochromatin
D) euchromatin
E) nuclear envelope
B
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Which of the following statements about joints is false?
A. A hinge joint can be controlled by two antagonist muscles, whereas ball and socket joints require at least four sets of muscle antagonists. B. The shoulder is the most mobile joint in the human body. C. A ball-and-socket joint is less stable than a hinge joint. D. Ball-and-socket joints allow motion along three axes, whereas hinge joints limit motion to one axis of rotation. E. The range of motion of a joint is determined by the shapes of the bone surfaces that meet at the joint.
The alimentary canal is ________.
A. the accessory organs B. the esophagus C. the small and large intestines D. the series of digestive organs
The smallest known infectious agents containing RNA or DNA are ________.
Fill in the blank(s) with the appropriate word(s).
Hershey and Chase demonstrated that when the bacteriophage T2 infected its host cell, the ________ is injected into the host but the ________ remained outside.
Fill in the blank(s) with the appropriate word(s).