Briefly explain the action of a neurotransmitter. Include information regarding the source, target, and
mode of operation of a neurotransmitter. What will be an ideal response?
This process is summarized in Fig. 41-11 on textbook p. 8
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At which enzymatic step of glycolysis is water a product?
A) 3 B) 5 C) 6 D) 9 E) 10
Phylogenetic relationships between prokaryotes are most accurately determined using
A. phenotypic characterizations. B. genotypic information. C. the fossil record. D. carbon dating. E. phenotypic characterizations AND genotypic information.
Some environmental scientists think that global warming will lead to an even greater increase in the amounts of carbon dioxide in the atmosphere. This would most likely be due to
a. increased use of air conditioners. b. developing nations maturing into developed nations, thereby increasing use of fossil fuels. c. more people driving to cooler regions to escape the heat. d. decreases in the protective ozone layer surrounding the Earth. e. melting of the polar ice caps and thawing of large regions of permafrost.
Although energy flows in one direction in an ecosystem, nutrients ____ through an ecosystem
a. move from consumers to producers b. drive the energy flow c. build up d. deteriorate e. cycle