B1g - Controlling Plant Growth

Question 1

Describe shoots

Answer 1

Positively phototropic but negatively geotropic

Question 2

Describe roots

Answer 2

Negatively phototropic but positively geotropic

Question 3

What are auxins?

Answer 3

A group of plant hormones

Question 4

What do auxins do?

Answer 4

• move through the plant in solution
• are involved in the response to light (phototropism)
• are involved to the response to gravity (geotropism)

Question 5

Where are auxins made and what happens in response to light?

Answer 5

They are made in the top and they are unequally distributed in response to light

Question 6

What is phototropism?

Answer 6

Light

Question 7

What is geotropism?

Answer 7

Gravity

Question 8

What are the commercial uses of plant hormones?

Answer 8

• selective weedkillers
• rooting powder
• fruit ripening (delay or acceleration)
• control of dormancy