To which class of neurotransmitters does glutamate belong?
a. acetylcholine
b. monoamines
c. amino acids
d. neuropeptides
e. gaseous neurotransmitters
ANSWER: c
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Name two cellular organelles, each having genetic material, that are involved in either photosynthesis or respiration
What will be an ideal response?
Each of the following structures is found within the nucleus of a eukaryotic cell except
A) transfer RNA. B) histones. C) plasmids. D) the nucleolus. E) All of these are found in the nucleus.
Sustainable development ________. I) will require making difficult decisions regarding the environment and lifestyle II) must be achieved if the human species is to survive III) will require global, multinational cooperation
A) I only B) II only C) III only D) I, II, and III
The following figure shows studies in a stream where enclosures were set up either with trout or with no trout. Which statement is a correct interpretation of the graph about trout, invertebrates, and algae? 
A. Trout do not seem to affect the algae production; only the invertebrate populations are affected. B. If trout are present in a system, algae production is low and invertebrate population levels are also low. C. Trout do affect the algae production but not the invertebrate populations. D. If trout are present in a system, algae production is high and invertebrate population levels are also high. E. If trout are present in a system, algae production is high and invertebrate population levels are low.