The lymphatic system
A. contains cells.
B. has valves.
C. is found throughout the body.
D. All of the above are correct.
D. All of the above are correct.
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N-terminal sequences of four different bacterial proteins are listed below. Which of these proteins would have the shortest half-life?
A. Ala-Val-Ile---- B. Ser-Glu-Gly---- C. Lys-Gln-Pro---- D. Thr-Gly-Ala----
Which of the following is not an example of a smooth muscle?
a. intestinal wall b. wall of large blood vessel c. abdominal body wall muscle d. outer uterine wall e. urinary bladder wall
The immediate stimulus for the release of milk from
the female breast is the a. culmination of the maternal instinct. b. excessive accumulation of milk. c. mechanical stimulation of the breast by sucking. d. time of day. e. interaction of hormones.
The unique double shells of diatoms are made of
A. silica. B. chlorophylls. C. proteins. D. cellulose. E. agar.