☀️Plants Responce

Question 1

Stimulus

Answer 1

Anything that causes a reaction in an organism

Question 2

Responce

Answer 2

The activity of a cell or organism as a result of a stimulus

Question 3

Structures required for Responce

Answer 3

Immune system
Method of movement
Nerve / sense organ system

Question 4

External factors of plant Responce

Answer 4

Light - energy - photosynthesis 
Day length 
Gravity
Temperature 
Reaction

Question 5

Plants grow faster at

Answer 5

A higher temperature

Question 6

Temperature effects

Answer 6

The rate of an enzyme

Question 7

Gravity causes roots to

Answer 7

Grow down into the soil and shoots upwards

Question 8

Internal factors

Answer 8

Plants produce chemicals called growth regulators

Question 9

Where are growth regulators produced

Answer 9

In the meristem

Question 10

Tropism

Answer 10

The change in the growth of a plant in Responce to an external stimulus

Question 11

Positive tropism

Answer 11

Occurs when the growth is towards a stimulus

Question 12

Negative tropism

Answer 12

Occurs when the growth is away from the stimulus

Question 13

Name the 4 types of tropisms

Answer 13

Phototropism
Geotropism
Hydrotropism
Chemotropism

Question 14

Photo tropism

Answer 14

Change in growth of a plant in Responce to light

Question 15

Geotropsim

Answer 15

Change in growth of a plant in respond to gravity

Question 16

Hydrotropism

Answer 16

Change in growth of a plant in Responce to water

Question 17

Chemotropism

Answer 17

Change in growth of a plant in Responce to chemicals

Question 18

Growth regulators

Answer 18

Chemicals that change the growth of a plant

Question 19

Growth promoters

Answer 19

Cause increased plant growth

Question 20

Name a growth promoter

Answer 20

Auxins

Question 21

Growth inhibitors

Answer 21

Reduce or stop growth

Question 22

Name a growth inhibitor

Answer 22

Tehehe

Question 23

IAA

Answer 23

Indoleacetic acid

Question 24

IAA

Answer 24

The best known auxin

Question 25

Effects of auxins are to cause

Answer 25

Tropisms Fruit formation Root formation and growth

Question 26

Functions of auxins

Answer 26

Stimulating growth Developing fruit Causing phototropism

Question 27

Growth inhibitors include

Answer 27

Ethene Abscisic acid Cause plants to respond to harmful conditions Cause stomata to close in dry conditions

Question 28

Ethene

Answer 28

Gas that ripens fruit

Question 29

Commercial growth regulators are used to

Answer 29

Ripen fruits | Stimulate root formation (rooting powders)

Question 30

Plant protection methods

Answer 30

Anatomical / structural (bark) | Chemical (stress proteins)

Question 31

Name a stress protein

Answer 31

Phytoalexins

Question 32

When do plants produce stress proteins

Answer 32

When a plant is infected by a micro organism

Question 33

Name a way in which stress proteins act

Answer 33

Damage microorganisms by attacking their cell wall