Rain water gets polluted because of the water cycle bringing water into the atmosphere
Answer:
The answer is in image see it you will get all answers.
The cell has to use active transport when it's trying to transport material against the concentration gradient. (from low to high concentration) Or, if a molecule is too big to diffuse through the cell membrane, it must be moved through using a carrier protein.
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Answer:
A protein region with a specific function and structure is called a. Select one: a. conserved site.