Phototropism and AUxins worksheet

Phototropism and Auxin

1a. Explain what positive and negative phototropism are.

1b. Explain why positive and negative phototropism is needed for a plant to survive.

Positive phototropism _________________________________________

Negative phototropism ________________________________________

2a Which part of the plant shoot is most sensitive to light

2b. Which plant hormones control growth near this part?

2c. On each shoot in the diagram, shade in the region that contains the most of this hormone.

3a. Describe the expected responses of shoots A and B to this treatment.

I) shoot A

ii) Shoot B

3b. Explain your answers

I) Shoot A

ii) Shoot B