The saguaro is a giant cactus that is found in desert regions of Arizona. This is information about the cacti's ________
A) niche B) succession C) biosphere D) habitat
Answer: D
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The diphtheria component of the DTaP vaccine is a(n)
A) toxin. B) toxoid. C) antitoxin. D) antitoxoid.
During fermentation, pyruvate is:
A. oxidized. B. reduced. C. phosphorylated. D. hydrogenated. E. carboxylated.
Duplicated centrioles move to opposite poles of a(n) ____ cell during ____ of the cell cycle
a. animal; prophase b. plant; prophase c. animal; metaphase d. plant; metaphase e. both animal and plant cells; prophase
Which statement with regard to pore spaces is false?
a. Minerals are removed from soil via leaching. b. Water is held in the smaller pores, and air is found in the larger pores. c. They occupy approximately 50% of a soil's volume. d. They typically contain more carbon dioxide than found in the atmosphere. e. Immediately after a heavy rain, most pore spaces remain filled with air.