Answer:
because HIV is a virus and antibiotics treat bacterial infections.
Explanation:
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Minerals are not found in coals or pearls.
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some bacteria called nitrogen fixers convert atmospheric nitrogen to ammonia
Answer:
Rust is iron oxide or Fe304, water is H2O
3Fe + 4H2O → Fe3O4 + 4H2
Explanation:
Spring occurs when the sun is directly over-head the equator. Winter, on the other hand, occurs when the sun is at the tropic of Capricorn and the North Temperate Zone experiences winter.
• Spring means more daylight while winter means less daytime and more night time.
