The study of the distribution of plants and
animals around the Earth is called
a. comparative morphology.
b. botany.
c. biogeography.
d. geology.
e. paleontology
C
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____ is contained in anoxygenic bacteria and plays a similar role as chlorophyll in cyanobacteria
Fill in the blank with the appropriate word.
A cyst formed by a protist functions
A. as a protective mechanism against adverse changes in the environment. B. in transfer from one host to the next. C. in repair of damage to the cell envelope. D. as a protective mechanism against adverse changes in the environment and in transfer from one host to the next.
The target cells of glucagon are
a. the liver cells. b. the skeletal muscle cells. c. the fat cells. d. all of these cells. e. none of these cells
Contraction of the diaphragm ____.
A. diminishes the volume of the thoracic cavity B. increases the volume of the thoracic cavity C. pushes the rib cage downward D. causes external intercostal muscles to relax E. decreases lung capacity