When Pangea first broke up it formed
a. North and South America.
b. Africa and South America.
c. Antarctic and Godwanaland.
d. East and West Hemisphere.
e. Laurasia and Godwanaland.
E
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Prokaryotes are very important ecologically because of their involvement in all of the following except
A. photosynthesis. B. nitrogen fixation. C. STDs. D. denitrification. E. bioremediation.
Which pigment(s) is/are characteristic of chlorophytes?
a. chlorophyll a b. phycobilins c. chlorophyll b d. fucoxanthin e. chlorophylls a and b
Compare and contrast the structure and function of ion channel-linked receptors, G protein-linked
receptors, and enzyme-linked receptors. In general, how do they differ from intracellular receptors? What will be an ideal response?
In which microscope does the image look like a negative stain?
a. Fluorescence microscope b. Phase-contrast microscope c. Darkfield microscope d. Two-photon microscope e. Scanning acoustic microscope