Members of the genus Micrococcus usually exist as ________.
A. irregular clusters
B. pairs
C. tetrads
D. All of the choices are correct.
Answer: D
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Which of the following is a mobile electron carrier in the electron-transport chain?
What will be an ideal response?
Scientists attempt to avoid bias by which of the
following?
a. designing quantative experiments b. experiments repeated by other scientists c. publicly publishing their results d. controlled as many variables as possible e. all of these are attempts to avoid bias.
The human heart
a. contracts as a result of stimuli from the sinoatrial node. b. contracts only as a result of nerve stimulation from the central nervous system. c. is activated primarily through the autonomic nervous system. d. rate is primarily under the control of the atrioventricular node. e. is independent of all nervous control.
All populations of all species in a specified area __________
Fill in the blank(s) with the appropriate word(s).