Answer:The cell membrane functions as a barrier that makes it possible for the cytoplasm to maintain a different composition from the material surrounding the cell. The unit membrane is freely permeable to water molecules but very impermeable to ions and charged molecules. It is permeable to small molecules in inverse proportion to their size but in direct proportion to their lipid solubility.
Explanation:
B) Hemogoblin
I’m pretty sure
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Physical Change, although the answer is widely disputed.
Answer:
1649 years
Explanation:
It took 1649 years for the world population to double, going from . 25 billion people to . 50 billion people
