Which of the following would NOT be a possible explanation for high chromosome numbers in ferns?
a. Polyploidy d. Increased recombination rates
b. Dysploidy e. Homospory
c. Selection for increased independent
assortment
B
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The cytomegalovirus (CMV) produces cytopathic effects (CPE) in diploid fibroblast cells in an average of 7 days. The results are available within 16 hours using which type of assay?
a. Conventional cell culture b. Shell vial c. Paired sera d. Western blot
The Cretaceous ended _____ million years ago
Fill in the blank(s) with correct word
All EXCEPT which of the following must be
available for the light-independent reactions to occur? a. carbon dioxide b. oxygen c. ribulose bisphosphate d. ATP and NADPH e. enzymes
Which microscope is used primarily to view unstained spirochetes?
A. Phase contrast microscope B. Dark field microscope C. Electron microscope D. Bright field microscope E. Fluorescence microscope