The basic unit of contraction in a muscle is the
a. myofibril.
b. sarcomere.
c. sliding filament.
d. contractile vacuole.
e. Z band.
B
You might also like to view...
Lack of telomerase activity limits what?
A. the rate of DNA replication B. the number of replication bubbles that form during replication C. the number of times a cell can divide D. the number of Okazaki fragments that can be linked together E. the rate of meiosis
Psilotum lacks
a. roots. b. a mechanism to take up water and minerals. c. vascular tissue. d. alternation of generations.
Which cells aid in the operation of the nervous system but are unable to conduct nerve impulses?
A. goblet cells B. neuroglia C. intercalated disks D. neurons
To be a viable alternative, nuclear power facilities must have
A. proper waste disposal. B. security. C. safe operation. D. All of these.