Which statements describe hydrotropism?

Check all that apply.

1 Hydrotropism is a plant’s response to light.

2 Hydrotropism is a plant’s response to an external stimulus.

3 Hydrotropism causes cells to grow longer on one side of the roots.

4 Hydrotropism causes cells to grow longer on one side of the stems.

5 Hydrotropism causes a plant to grow toward light.

6 Hydrotropism causes a plant to grow away from light.