Answer:
Cell membranes are composed primarily of fatty-acid-based lipids and proteins.
Explanation:
Answer:
The Answer is Letter A.
Explanation:
let residents build groins
Answer:
C
Explanation:
Green house and solar radiation
Answer:
One biotic factor includes soil, air(oxygen and carbon dioxide), water.
One biotic factor includes animals and plants.
Both factors are different in each ecosystem. This is because, for example, the soil in desert ecosystem can differ from the polar ecosystem. Animals in polar ecosystems include polar bears, wolves, etc. while desert ecosystems have animals like deer, artic fox, etc.
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Answer:
the controlled variable will be the mass of vitamin C the scientist has to give the rats