Answer:
Proteins, carbohydrates, nucleic acids, and lipids are the four major classes of biological macromolecules.
Macromolecules are made up of single units known as monomers that are joined by covalent bonds to form larger polymers.
Explanation:
Radiation can cause plant cells to mutate and change from an original population
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Oil spills can do a lot of damage to the ocean, and can (of course) kill, or harm a lot of sea life. This might include otters, shrimp, and many other forms of sea life below the surface. On top of that, it takes months, or even years to clean up an oil spill.
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Nucleicacid is inside the bacteriophage
The endosperm provides nourishment.