It would be the first option. Adenine and thymine.
Answer:
Hi
Explanation:
It separates the content of cell from their external environment.
It controls the entry and exit of materials in nd out of cell
<span>They are made up of nitrogen bases, sugars, and phosphates.
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An environmental change is occurring due to continents shifting and moving to different parts of the earth’s surface is a long term change due to tectonic plates movements. if this happends for the continously then there will be different sesonal changes .
Because people and animals exhale carbon dioxide which plants need and they release oxygen