Q: The only invertebrates than can fly belong to what broad group, which is highly successful? Choices: - spiders - birds - bats - insects A:
insects
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Q: Why do sodium and chloride ions attract each other? Choices: - sulfides attract - magnetism - like attracts like - opposites attract A:
opposites attract
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Q: What makes breathing difficult due to respiratory system disease? Choices: - weak lungs - slippery air passages - water in the lungs - narrow air passages A:
narrow air passages
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Q: What is added to alcohol and used as an antiseptic? Choices: - chloride - arsenic - chlorine - iodine A:
iodine
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