Action potentials traveling down the plasma
membrane of a muscle fiber will next reach the
a. plasma membrane.
b. sarcoplasmic reticulum.
c. cytoskeletal system.
d. T tubules.
e. endomembrane system
D
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Which of the following regions of a structural gene contains the information that specifies an amino acid sequence?
A. promoter region B. transcribed region C. terminator D. regulatory sequence E. enhancer region
The yolk sac is indicated by
a. A. b. B. c. C. d. D. e. E.
Annelids ________.
a) have an exoskeleton and paired jointed appendages b) have a radical symmetry c) are segmented worms like earthworms and leeches d) are the simplest animals with organs and organ systems
The woven, intertwining mass of hyphae that makes up the body of a mold is a/an
A. Septum B. Rhizoid C. Spore D. Bud E. Mycelium