Chapter 25

Question 0

The portion of an organism affected by a particular hormone

Answer 0

Target cell

Question 1

A substance that is produced in one part of an organism and affects another

Answer 1

Hormone

Question 2

Tendency of a plant to grow toward a source of light

Answer 2

Phototropism

Question 3

Regulates cell growth and stimulates cell elongation

Answer 3

Auxins

Question 4

Response of a plant to the force of gravity

Answer 4

Gravitropism

Question 5

Causes gravitropism

Answer 5

Auxins

Question 6

Meristematic area on a side of a stem that gives rise to side branches

Answer 6

Lateral bud

Question 7

The closer a cell is to the stems tip, the more inhibited it is

Answer 7

Apical dominance

Question 8

Compounds that are toxic to plants

Answer 8

Herbicides

Question 9

Plant hormones that are produced in growing roots and in developing roots and seeds

Answer 9

Cytokinins

Question 10

Growth promoting substance

Answer 10

Gibberellin

Question 11

One of the minor components of natural gas

Answer 11

Ethylene

Question 12

Responses of a plant to external stimuli

Answer 12

Tropisms

Question 13

Response of a plant to touch

Answer 13

Thigmotropism

Question 14

Flower when days are short

Answer 14

Short day plants

Question 15

Flower when days are long

Answer 15

Long day plants

Question 16

Chrysanthemums and poinsettias

Answer 16

Short day plants

Question 17

Spinach and irises

Answer 17

Long day plants

Question 18

Plants response to periods of light and darkness

Answer 18

Photoperiodism

Question 19

Pigment responsible for photoperiodism

Answer 19

Phytochrome

Question 20

Seals the leaf off from its vascular system

Answer 20

Abscission layer

Question 21

Plants that live in the desert biome

Answer 21

Xerophytes

Question 22

Plants that are not rooted in the soil but instead grow directly on the bodies of other plants

Answer 22

Epiphytes

Question 23

Produced in the apical meristem

Answer 23

Auxins

Question 24

Produced in growing roots

Answer 24

Cytokinins

Question 25

Stimulates fruit to ripen

Answer 25

Ethylene

Question 26

Stimulate the growth of lateral buds

Answer 26

Cytokinins

Question 27

Produce dramatic increases in size

Answer 27

Gibberellins

Question 28

Cause dormant seeds to sprout

Answer 28

Cytokinins

Question 29

Promotes root growth

Answer 29

Auxins

Question 30

Promotes cell division

Answer 30

Cytokinins