Cell Membrane = Controls what comes into and out of a cell; found in plant and animal cells
The Sun cause That's What Gives it Food
"The taller you are, the faster your heart rate." This hypothesis is testable, but not experimental.
Answer:
The explanation is given in the explanation section.
Explanation:
Living organisms make biomolecules, and they are made because of their functional characteristics. Most of the biomolecules do not exist outside of living organisms because they are too complex to be created by chance chemical collisions.
The four primary purposes of biomolecules are:
- Structure (some proteins)
- Energy storage and release (carbohydrates)
- Protective layers (lipids)
- Information storage and communication (DNA, RNA, endocrines of numerous various types and manipulated molecules, such as fatty acids)
In the 21st century solar energy is expected to become increasingly attractive as a renewable energy source because of its inexhaustible supply and its nonpolluting character, in stark contrast to the finite fossil fuels coal, petroleum, and natural gas.
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