Which statement concerning a scientific theory is FALSE?
a. It may suggest practical applications.
b. It predicts new facts.
c. It is based on a number of hypotheses.
d. It is unchangeable.
e. It is supported by many observations.
D
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Mammals and birds are descendents of reptiles, but are not included within the taxon Reptilia. As a taxon Reptilia is
A. polyphyletic. B. polygenetic. C. paraphyletic. D. a supergroup. E. a kingdom.
Continental drift caused the large supercontinent that existed during the Paleozoic era to separate into a northern
continent, called ____, and a southern continent, called ____.
a. Pangaea; Laurasia b. Laurasia; Gondwana
c. Gondwana; Laurasia d. Pangaea; Gondwana e. Gondwana; Pangaea
Identify the hydrophobic side chain of chlorophyll in the figure above
a. 5 with 3 b. 5 with 4 c. 5, regardless of the R group d. 6 e. 7
Which of the following is the main form of nitrogenous wastes released by mammals to their
environment?
a. nitrate b. ammonia c. uric acid d. amino acids e. urea