Ques:Q: What do you call a group of organisms of the same species that live in the same area? Choices: - system - ecosystem - biosphere - population A:

Ans:population
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Ques:Q: They had demonstrated that particles smaller than bacteria cause what? Choices: - blood - flight - damage - disease A:

Ans:disease
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Ques:Q: An environment in which cells neither sink nor swell is known as what? Choices: - pressured environment - electrolyte environment - exothermic environment - isotonic environment A:

Ans:isotonic environment
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Ques:Q: What device is used to stop a current in a circuit? Choices: - a signal - a valve - a mirror - a switch A:

Ans:
a switch
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