Which of the following has a gut with two openings,
a mouth, and an anus?
a. cnidarians
b. annelids
c. flatworms
d. sponges
e. placozoans
Answer: b
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Which of the following is not a characteristic of nematodes?
A. They have bilateral symmetry. B. They exhibit cephalization. C. They are unsegmented. D. They have a coelom. E. They have a complete digestive tract.
Which of the following structures would be
most attractive to a fire ant?
a. an electric can opener b. a canvas patio umbrella c. aluminum foil d. a ceramic flower pot e. a leather sofa
Which of the following could not be considered a secondary tissue?
a. xylem b. phloem c. epidermis d. periderm e. cork
RNA primers are added, what do they provide to DNA polymerase that is essential to its function?
a. a free 5' phosphate b. partially double stranded DNA c. RNA d. a free 3' OH