Why does the eyecup of the flatworm only detect light and dark, not images?
A. There are too few photoreceptors.
B. There is no lens.
C. The eyecup is lined by a pigmented
epithelium.
D. Flatworms do not have a brain.
B
Biology & Microbiology
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Microorganisms do not generally reproduce sexually; therefore, species are usually defined by phenotypic and genotypic similarities.
Answer the following statement true (T) or false (F)
Biology & Microbiology
Argon has 18 protons. How many electrons are in its third energy level?
a. 2 b. 4 c. 6 d. 8 e. 10
Biology & Microbiology
The portion of the DNA molecule that is translated is
composed of a. introns. b. anticodons. c. exons. d. transcriptons. e. exons and transcriptons.
Biology & Microbiology
The fovea centralis has the highest concentration of
A. rhodopsin. B. cones. C. night vision receptors. D. rods.
Biology & Microbiology