Q: The main advantage of urea is its very low what? Choices: - temperature - cost - energy requirement - toxicity A:
toxicity
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Q: What occurs when nature reclaims areas formerly occupied by life? Choices: - typical succession - tertiary succession - primary succession - secondary succession A:
secondary succession
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Q: What is defined as the ability to cause changes in matter? Choices: - evolution - momentum - nuclear - energy A:
energy
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Q: Viroids are plant pathogens much simpler than what, but like them can reproduce only within a host cell? Choices: - pests - bacteria - parasites - viruses A:
viruses
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