2.83 Phototropism and Geotropism

Question 1

What is phototropism?

Answer 1

Growth towards or away from the direction of the light source

Question 2

What is geotropism?

Answer 2

Growth towards or away from the source of gravity

Question 3

What is a positive phototrophic response?

Answer 3

A growth towards the light source

Question 4

What is a negative phototrophic response?

Answer 4

A growth away from the light source

Question 5

What is a positive geotrophic response?

Answer 5

Growth towards the source of gravity

Question 6

What is a negative geotrophic response?

Answer 6

Growth away from the source of gravity

Question 7

What is auxin?

Answer 7

Plant growth regulators that coordinate and control directional growth responses

Question 8

Describe what happens when a light source shines from a particular direction?

Answer 8

-Auxins diffuse to the side without heavy sunlight
-Uneven growth caused by the movement of auxins will cause the shaded side to elongate faster than the side with light