Answer: They help control what enters and leaves the cell.
Explanation: carbohydrates also help the immune system identify if the cell is foreign or not.
Pressure decreases with increasing altitude.
Continental drift happened around the Jurassic period, 175 million years ago.
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Answer: The number of protons in one atom of an element determines the atom's identity, and the number of electrons determines its electrical charge.
Explanation:
Answer:
Therefore, an isolated ecosystem, will only be sustainable if it fulfills the condition of Organizational Sustainability:
Explanation:
