Answer:
D. They used simple molecules from early times and put them in a simulation from that time and it made complex ones that we have now.
Answer:
A
Explanation:
The top answer is correct, over time it has become weaker.
Answer:
Channel protein.
Explanation:
Channel protein have gate that opens and close which allow the passage of polar substance or ions to move to permeable membrane of the cell by diffusion. They are water filled and allow the movementof charged molecules inside and outside the cell membrane i.e polar molecules move through non polar bilayer of the cell membrane.
