Earth has a constant tilt of _____ on its axis from its plane of orbit.
A. 5.5°
B. 9°
C. 12.5°
D. 23.5°
E. 30°
D. 23.5°
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Which type of microscopy enhances and amplifies slight changes in the phase of transmitted light?
A) differential interference contrast microscopy B) digital video microscopy C) fluorescence microscopy D) phase-contrast microscopy E) both choices A and D
Amniocentesis and genetic screening reveal that a fetus carries a defective L1-CAM gene. What defects do you expect, and why?
What will be an ideal response?
During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level?
A) NADH B) ATP C) ADP + i D) FADH2
Bergey's Manual contains
A) classification schemes for prokaryotes. B) treatments for bacterial diseases. C) recipes for bacterial growth media. D) genetic sequences of prokaryotes. E) rules for naming new bacterial species.