Ques:An animal needs to attract a mate to reproduce, and some animals attract mates with scent. Given these facts, what purpose do some animals have for scent among the following options: - important habitats - exoskeleton - sensory neurons - reproduction - nervous system - Something to move - critical organs - unidirectional

Ans:reproduction
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Ques:Planting trees has a positive impact on an ecosystem, and an ecosystem contains many habitats. Given these facts, doing what with trees has a positive impact on habitats among the following options: - making tables - chopping down - planting - watershed - earth - bloom time - growth - timbering

Ans:planting
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Ques:Antigens are molecules that the immune system recognizes as foreign to the body, and antibodies are produced to fight antigens. Given these facts, what happens when the immune system recognizes a foreign substance among the following options: - an area swollen with pus - The immune system fails - irradiation - Bacteria dies - Antibodies are formed - major threat to health - Something that causes allergies - Viruses reproduce

Ans:Antibodies are formed
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Ques:High pressure systems cause clear weather, and during windy weather, the pollution is dispersed and cleared away. Given these facts, what cause pollution to disperse among the following options: - low pressure systems - fissures of hot, acidic water - zero pressure systems - fossil fuels - harmful substances - no pressure systems - high pressure systems - Greenhouse gases

Ans:
high pressure systems
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