Answer: Define Active transport
Explanation: The moving of molecules or ions across the cell membrane.
Hope this helps!
Answer:
Photosynthesis.
Explanation:
Plants do not respirate, but the stomata in their leaves pull in carbon dioxide for photosynthesis.
Answer:
Hydrogen ions
Explanation: pH is the concentration of hydrogen ions (H+) in a given solution. A pH of 1 means there are a lot of hydrogen ions and a pH of 14 means there is a very small concentration if them.
That is to protect Cell from external Harsh Environment
Hope this helps!