Answer:E.
Explanation:The MMR mostly affects children and if not administered vaccine in time to save a respond that prevent subsequent reoccurence of infection, it will lead to severity of infection (secondary infection ) probably if resurfaced at adult stage.
Answer:
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Explanation:
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Its autotrophs, they are the first level of the food pyrimid
The atmosphere is a mixture because it contain many types of gases , liquids and solids.