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Scientists question whether animals understand the meaning of the signals they give and receive in the study of animal
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18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions
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Involving transcription and translaton. explain the causes and effects of damage to the genetic code.
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Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems
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An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil
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Scientists question whether animals understand the meaning of the signals they give and receive in t...
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