The place where a species normally lives is a(n) ____
a. environmental system
b. habitat
c. biome
d. ecosystem
e. niche
ANSWER: b
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Which of the following statements about bulk transport is false?
A. Bulk transport is found in simple multicellular organisms, but not unicellular organisms. B. Bulk transport involves the active transport of molecules throughout an organism's body. C. Bulk transport allows for materials to be moved over greater distances than is possible with diffusion. D. Bulk transport moves materials at faster rates than is possible with diffusion. E. Bulk transport allows for animals and plants to grow very large.
What encodes the toxin paramecin in Paramecia aurelia?
A. mtDNA B. cpDNA C. Nuclear DNA D. Kappa particles
In 2006, the greatest use of energy in the United States was _____
1.nuclear energy going to industry 2.natural gas for residential and commercial uses 3.petroleum used for transportation 4.petroleum used in industry
Chordae tendineae:a
hold the AV valves in place. b. contract when the heart contracts. c. are one part of the conductance system of the heart. d. regulate blood flow into the ventricles. e. are stretched during ventricular systole