The majority of all known animal species are:
A. flowering plants.
B. cnidarians.
C. vertebrates.
D. insects.
D
Biology & Microbiology
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The decision to initiate an action potential is made at the:
A. synapse. B. axon hillock. C. cell body. D. dendrite.
Biology & Microbiology
When communities of organisms interact with their physical environment they form a(n)
A. population. B. organism. C. community. D. ecosystem. E. macromolecular community.
Biology & Microbiology
The movement of organic compounds in phloem is
described as a. sink-to-source. b. pressure flow. c. cohesion-tension. d. active transport. e. transpiration pull.
Biology & Microbiology
The organelle involved in the oxygen-requiring process by which the energy harvested from macromolecules is used to generate ATP is the:
A. ER. B. mitochondria. C. chloroplasts. D. nucleus. E. lysosome.
Biology & Microbiology