A small group of mice are released on an island without mice but with abundant food for mice and no predators. Initially, the growth of the mouse population will be limited mainly by what?
A. the carrying capacity
B. the biotic potential
C. only density-dependent factors
D. only density-independent factors
B. the biotic potential
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Members of the phylum Chordata have ________ just behind their mouths that extend to the outside environment.
a. book gills b. pharyngeal slits c. tonsils d. madreporites
An opening in leaves that functions in the exchange
of gases is called a a. cuticle. b. stoma. c. guard cell. d. pit. e. pore.
Fish gills consist of a series of
A) parabronchi. B) interconnected bronchioles. C) spiracles. D) filaments. E) opercula.
While glucose is filtered out at the glomerulus, none is excreted in the urine. What happens to the glucose?
A. It is reabsorbed at the distal convoluted tubule. B. It is secreted at the distal convoluted tubule. C. It is reabsorbed from the collecting duct. D. It is reabsorbed at the proximal convoluted tubule. E. It is secreted at the proximal convoluted tubule.