In ________, atmospheric nitrogen is converted to a more usable form for living organisms.
Fill in the blank(s) with the appropriate word(s).
nitrogen fixation
In nitrogen fixation, atmospheric nitrogen is converted to a more usable form by the nitrogen fixing bacteria.
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Upon ingestion of a food particle by a protozoan, the food particle is in a/an
A. lysosome. B. mitochondrion. C. endoplasmic reticulum. D. phagocytic vacuole.
Cephalization is
A. embryonic development of the head in advance of the rest of the body. B. concentration of the sensory organs on the posterior end of the body. C. concentration of the sensory organs on the anterior end of the body. D. an evolutionary degeneration of the head as seen in some parasites. E. a malformation of the head.
The products of tumor suppressor genes stimulate cell proliferation, while the products of proto-oncogenes inhibit cell proliferation
Indicate whether the statement is true or false
Omega-3 fatty acids increase LDL levels
____________________ Indicate whether the statement is true or false.