Answer:
A cell is basically made of biological molecules (proteins, lipids, carbohydrates and nucleic acids). These biomolecules are all made from Carbon, hydrogen and oxygen. Proteins and nucleic acids have Nitrogen.
Explanation:
The cell membrane is semi-permeable, kind of like a filter to let some molecules in and keep larger molecules out
Option C would be correct. The organ system can plays many parts at one time. Also, it is the only system listed.
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Answer:
the meaning of biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
Explanation:
B. Every ecosystem has weather