Tumors that arise from mesenchymal cell types are called
a) carcinomas
b) lymphomas
c) sarcomas
d) adenocarcinomas
Answer: c) sarcomas
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What type of species, if removed from the community, could lead to the collapse of the entire community?
A. Invasive species B. Indicator species C. Keystone species D. Flagship species
The mantle in mollusks
a. secretes the shell and protects the animal. b. contains the internal organs. c. functions in obtaining food. d. is involved in movement. e. is composed of calcium carbonate.
Valleys are usually ________ than nearby hilltops because ________
A) warmer; they receive more solar irradiance B) cooler; they usually hold a body of cool water C) cooler; cool air is heavier than warm air D) warmer; warm air is heavier than cool air
MMPs are ___ dependent.
a. Zinc b. Phosphorous C. Calcium d. Iron