Plants, algae, and certain prokaryotes are:a
photoheterotrophs
b. chemoheterotrophs.
c. chemoautotrophs.
d. independent trophs.
e. photoautotrophs.
E
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The reacting molecules in an enzyme-catalyzed reaction are called ________.
Fill in the blank(s) with the appropriate word(s).
The Schwann cell's counterpart in the central nervous system is the
a. microglial cell. b. astrocytes. c. ependymal cells. d. oligodendrocytes. e. satellite cells.
All of the following are ways in which enzymes are regulated by the cell EXCEPT
A) a heavy metal (such as lead) may block the enzymes non-active site. B) by first synthesizing the enzyme in an inactive form. C) by feedback inhibition. D) a gene coding for the enzyme may be turned off.
An organism that lacks integration centers _____
A) cannot receive stimuli B) will not have a nervous system C) will not be able to interpret stimuli D) can be expected to lack myelinated neurons