Plant Hormones

Question 1

A tropism caused by light is a what?

Answer 1

Phototropism

Question 2

Plant roots are normally what?

Answer 2

Negatively phototrophic

Question 3

What is a tropism away from a stimulus called?

Answer 3

Negative tropism

Question 4

Responding to a stimulus by growing towards or away is called

Answer 4

A tropism

Question 5

So a positive phototropism is….?

Answer 5

Growth towards the light

Question 6

What is positive phototropism is caused by?

Answer 6

Auxins

Question 7

Describe the term ‘elongation’

Answer 7

Growth in one direction only

Question 8

Where are auxins created from?

Answer 8

The tip of the shoot

Question 9

So if auxins start at the tip of the shoot, where do they end up?

Answer 9

On the dark side of the plant

Question 10

What does auxins do to cells?

Answer 10

Makes them elongate

Question 11

What is a use of selective weed killers and how does it work?

Answer 11

Auxins. It makes plants with broad leaves grow out of control and die where as plant with narrows leaves are unaffected

Question 12

What is Auxin?

Answer 12

A plant growth hormone