Growth Factors

Question 1

Internal Growth Regulators

Answer 1

Auxins, Gibberellins, Cytokinins, Ethylene, Abscisic Acid

Question 2

Auxins

Answer 2

Growth regulators, found in all plant tissue. Functions: cell elongation, stimulate apical bud growth and growth + ripening of fruit

Question 3

Synthetic Auxins

Answer 3

Cause unwanted plants to grow very fast so they exhaust their carb supply and die

Question 4

GIbberellins

Answer 4

Promote cell division and elongation, used to stimulate seed germination

Question 5

Cytokinins

Answer 5

Hormones that stimulate cell division and leaf mesophyll growth

Question 6

Ethylene

Answer 6

Role in fruit ripening

Question 7

Absceisic Acid

Answer 7

Inhibitor of growth, promotes closure of stomata and provides resistance to water stress

Question 8

External Growth Regulators

Answer 8

Geotropism, Phototropism, Thigmotropism, Gravotropism

Question 9

Geotropism

Answer 9

Regardless of orientation, root grows downward and shoot grows upward

Question 10

Phototropism

Answer 10

The bending of plants towards light

Question 11

Thigmotropism

Answer 11

A growth response to mechanical stimuli such as touch or contact (ex. wind)

Question 12

Gravotropism

Answer 12

Growth response to gravity