Which part of the eye contains most of its blood vessels?
a. choroid.
b. retina.
c. sclera.
d. choroid.
e. cornea.
D
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Phycobilins are
(a) photosynthetic pigments. (b) found in the red algae. (c) blue and red pigments. (d) all of the above.
The major advantage of immunofluorescent microscopy assays is that:
a. extensive training is not necessary. b. it serves as an excellent way to preserve the reaction for referral and archiving. c. visual assessment of the adequacy of a specimen is possible. d. fluorescent microscopes are easily ac-cessible to most laboratories.
African sleeping sickness is caused by Trypanosoma brucei, a unicellular flagellated protist that infects red blood cells after being injected into the bloodstream. Trypanosoma brucei is which of the following?
A. a diatom B. an alga C. a protozoan D. a slime mold E. an apicomplexan
Which of the following statements regarding skeletal muscle is true?
A) Skeletal muscle is attached to bones by tendons. B) Skeletal muscle cells are not striated. C) Skeletal muscle is largely responsible for involuntary body motions. D) Skeletal muscle coordinates movement of nutrients and oxygen throughout the body.