Yellow River Civilization
The chemicals that helps us digest food are called enzymes.
Answer:
In cellular biology, active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement.
Explanation:
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Answer:
Common characteristics of birds and fishes are:
They can have Respiration.
They can move from one place to another.
