Rhizobia, actinomycetes, and cyanobacteria all share the common feature that they can _____
A) increase water uptake in plants
B) kill parasites in the soil
C) exist in extreme environments
D) fix atmospheric nitrogen
D
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If you were observing a newly discovered animal and wanted to determine if it reproduces sexually or asexually, you could
A. perform genetic screening on the parents and offspring to see if the offspring are genetically identical to parents. B. examine males to see if sperm can be produced. C. try to observe mating behavior. D. look carefully for nests with eggs. E. None of the answer choices is correct.
A wormlike arthropod with a flattened body
and carnivorous eating habits would be identified as a a. crustacean. b. millipede. c. spider. d. trilobite. e. centipede
Four of the five answers listed below are used in descriptions of the nerve sheath. Select the exception
a. Schwann cell b. threshold c. myelin sheath d. saltatory conduction e. node
Which neurotransmitter may function to regulate emotions and is involved in pathways that control complex movements?
A) dopamine B) serotonin C) norepinephrine D) synapse