Which plants utilize a specialized carbon fixation enzyme and a unique cell structure to reduce the problems of photorespiration?
A. C3
B. Arctic
C. C4
D. Desert
Answer: C
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Deuterostomia is a ____ lineage of animals that dates to the ____
a. polyphyletic; Mesozoic b. paraphyletic; Cenozoic c. monophyletic; Paleozoic d. paraphyletic; Paleozoic e. polyphyletic; Cenozoic
All vertebrates have ________.
A. a skull and a backbone B. four limbs and a backbone C. hair and a backbone D. scales and a backbone
The amnion is to the amniotic fluid as the allantois is to the
A. blood cell precursors. B. umbilical blood vessels. C. chorionic villi. D. yolk. E. amniotic cavity.
Clownfish live within the tentacles of sea anemones. The anemone protects the fish from predators, and the clownfish cleans the anemone. This relationship is an example of
A) parasitism. B) predation. C) succession. D) mutualism. E) competition.