Most protists are:a
aquatic.
b. parasitic.
c. terrestrial.
d. arboreal.
e. coenocytic
A
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If you wanted to cause the extinction of an entire phylum, you would need to kill every cycad.
Indicate whether the statement is true or false.
Plant cells release hydrogen ions and oxygen from H2O molecules in ____
a. photosystem I b. photosystem II c. cyclic photophosphorylation d. the light independent reaction e. carbon fixation
Human viruses can enter human cells by fusion with the cell membrane or by:
a. diffusion into the cell. b. passage through specific protein channels. c. coating themselves with lipids that cloak their entrance into the cell. d. endocytosis. e. hitchhiking onto protein signals entering the cell
Purines and pyrimidines are components in the building block units of all ________.
Fill in the blank(s) with the appropriate word(s).