SB6f: Plant Hormones Keywords

Question 1

Auxins

Answer 1

A group of plant hormones that affect the growth and elongations of cells.

Question 2

Ethene

Answer 2

A gaseous plant hormone that is involved in the ripening of fruit.

Question 3

Gibberellins

Answer 3

A group of plant hormones that cause seeds to germinate and flowers and fruits to form.

Question 4

Gravitropism

Answer 4

A growth response to the stimulus of gravity.

Question 5

Phototropism

Answer 5

A growth response to the stimulus of light.

Question 6

Plant hormone

Answer 6

A substance released by certain cells in a plant that has an effect on other cells, usually causing the cells to grow and develop in a certain way.

Question 7

Response

Answer 7

An action that occurs due to a stimulus.

Question 8

Stimulus

Answer 8

Change in a factor (inside or outside an organism) that is detected. For example, plants detect light. Plural is stimuli.

Question 9

Tropism

Answer 9

A response to a stimulus in which an organism grows towards or away from the stimulus. A positive tropism is a growth towards a stimulus, and a negative tropism is a growth away from the stimulus.