Non-coding DNA regions within a gene are referred to as
A. introns.
B. templates.
C. transposons.
D. pseudogenes.
E. exons.
Answer: A
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Which of these is an often abundant plankton organism in the North Sea?
a. Radiolarians b. Shrimp c. Coccolithophores d. Dinoflagellates e. Ocean sunfish (Mola mola)
Which animal is likely to have the circulatory pattern shown in the figure?
A. frog
B. mammal
C. bird
D. fish
E. crocodile
Peppers that produce more capsaicin would lose fewer seeds to herbivores. This would lead to selection.
A. disruptive B. stabilizing C. artificial D. sexual E. directional
One predator avoidance mechanism that has evolved in prey is
A) chemical defenses and bright coloration. B) secretion of digestive enzymes that hydrolyze glucose. C) secretion of enzymes that break down toxic plant compounds. D) development of a short gestation period.