One of these traits is NOT an adaptation for deep-water nekton. Which is it?
a) Large eyes
b) Bioluminescence
c) Ability to eat large, infrequent meals
d) Ability to swim swiftly for long distances
e) Dark coloration
D
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Pyroclastic sheet deposits are thin lava flows that often exhibit columnar jointing. Indicate whether the statement is true or false
The eruption that occurred on Mount St. Helens was triggered by a
A. huge landslide that caused a lateral blast that knocked down trees and buildings. B. cinder cone that sent up a large column of pyroclastic material. C. volcano that was so heavy that it caused part of the island to collapse. D. fast-moving viscous lava flow that flowed through the middle of Portland. E. None of these choices are correct.
What is the difference between a compound and a mixture?
A. The way in which their atoms are bonded together. B. The components of a mixture are not chemically bonded together. C. They both consist of atoms from different elements. D. One is a solid and the other is a liquid.
Which of the following is a major economic product of Central Asia countries?
A. oil, natural gas, and cotton B. fruits, tobacco, and rice C. wheat, corn, and fruits D. heavy machinery