Regardless of its shape, a given orbital may contain no more than:
A. 8 electrons.
B. 4 electrons.
C. 1 electron.
D. 2 electrons.
Answer: D
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The amount of available energy that can be used to promote change do work is called
A. enthalpy. B. entropy. C. free energy. D. kinetic energy. E. heat.
Into which kind of tissues does the ectoderm develop?
a. Muscles b. The nervous system c. Connective tissue d. Gastrointestinal
Amoebozoans are heterotrophic protists with cells that lack ____; therefore, they can constantly change shape
a. cell junctions b. a cytoskeleton c. a cell membrane d. a cell wall or pellicle e. pseudopods
Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine. What would you expect to be different in these two types of cells exposed to epinephrine?
A. presence of epinephrine receptors B. exposure to epinephrine released by neighboring cells C. activation of protein kinases D. types of proteins expressed E. rate of metabolism