The enamel in a tooth's crown directly covers the
a. root.
b. pulp cavity.
c. root canal.
d. dentin.
e. gingiva.
D
Biology & Microbiology
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In humans, fertilization usually occurs:
A. in the vagina. B. in the cervix. C. in the uterus. D. in the fallopian tubes. E. in the ovaries.
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Paired excretory organs found in most body segments of segmented worms are called ____
a. metanephridia b. parapodia c. septa d. clitella e. setae
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The dark middle layer of the eye that prevents the scattering of light is the
a. fovea. b. retina. c. sclera. d. choroid. e. cornea.
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What is a riboswitch?
What will be an ideal response?
Biology & Microbiology