Question

8/29 cfu - cells, cell membrane and transport (l)
the diagram represents the movement of three different substances across a cell membrane
click on the number(s) that shows that the movement of those substances will require energy from atp.

Explanation:

Step1: Understand transport types

Passive transport doesn't require ATP, while active transport does. Active transport moves substances against the concentration - gradient.

Step2: Analyze each substance movement

Substance 1 moves from higher to lower concentration (down the gradient), likely passive transport. Substance 2 moves from lower to higher concentration (against the gradient), which is active transport and requires ATP. Substance 3 moves from higher to lower concentration (down the gradient), likely passive transport.

Answer:

2