A ____ is a monocot.
A. maple tree
B. grass
C. fern
D. pine tree
B. grass
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All of the following structures are associated with an intestinal fold except: a. salivary secretions
b. lymph vessel. c. microvilli. d. blood vessel. e. villi.
Which of the following best describes sponges?
A. They are symmetrical, lack tissues, and do not move. B. They are asymmetrical, lack tissues, and do not move. C. They are asymmetrical, have tissues, and do not move. D. They are symmetrical, have tissues, and do not move.
A behavior that has a genetic basis is subject to evolution by __________. Fill in the blank(s) with the appropriate word(s)
The specific compound that is capable of receiving light energy as the first step in sensory transduction is
A. rhodopsin. B. melanin. C. vitamin A. D. cone opsin. E. retinal.