Question

1. what is passive transport? the movement of substances across a cell membrane using energy. the movement of substances across a cell membrane without using energy. the process where cells make their own energy. the movement of substances that only happens in animal cells. 6. what is diffusion? a type of active transport that moves large molecules into a cell. a way for cells to break down molecules for energy. a process for cells to divide and make more cells. a type of passive transport where molecules travel with the concentration gradient (from high to low)

Explanation:

1. The cell - membrane is semi - permeable, allowing certain substances to pass through while blocking others. This is its main function related to substance transport.
2. Passive transport is defined as the movement of substances across a cell membrane without the use of energy (ATP).
3. Diffusion is a type of passive transport where molecules move from an area of high concentration to an area of low concentration along the concentration gradient.

Answer:

For the first question (not numbered in the image but the first multiple - choice about cell membrane function): Allow certain substances to enter or leave the cell
For the second question (numbered 5): The movement of substances across a cell membrane without using energy
For the third question (numbered 6): A type of passive transport where molecules travel with the concentration gradient (from high to low)