The answer is organ systems I believe
Answer: you can recognize a plant cell by its rigid cell wall and by the fact that it contains fluid filled space known as a vacuole.
Explanation: hope this helps!
A cell membrane protects a cell from it's surroundings. The cell membrane controls the movement of substances from the outside and inside of cells and organelles.
Answer:
Row 2
Explanation:
amino acids link together to make proteins
