The four geologic eras are directly subdivided into
A) eons.
B) periods.
C) plates.
D) sub-eras.
E) epochs.
Ans: B) periods.
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Which of the following is microscopy in which the microscope is fitted with light filters that enable the excitation of the specimen with a specific wavelength?
A. Bright-field microscopy B. Dark-field microscopy C. Epifluorescence microscopy D. Electron microscopy
Most fungi are
A. aerobic or facultatively anaerobic. B. obligate anaerobes. C. obligate aerobes. D. microaerophiles.
The Y-shaped part of the DNA molecule where the actual replication process occurs is called the replication ________.
A. splice B. junction C. tongue D. fork
In a(n) (hypertonic/isotonic/hypotonic) solution, an animal cell can gain so much water that it may burst.
Fill in the blank(s) with the appropriate word(s).