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Biology > ☀️Plants Responce > Flashcards

☀️Plants Responce Flashcards

1
Q

Stimulus

A

Anything that causes a reaction in an organism

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2
Q

Responce

A

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

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3
Q

Structures required for Responce

A

Immune system
Method of movement
Nerve / sense organ system

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4
Q

External factors of plant Responce

A 
Light - energy - photosynthesis 
Day length 
Gravity
Temperature 
Reaction
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5
Q

Plants grow faster at

A

A higher temperature

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6
Q

Temperature effects

A

The rate of an enzyme

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7
Q

Gravity causes roots to

A

Grow down into the soil and shoots upwards

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8
Q

Internal factors

A

Plants produce chemicals called growth regulators

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9
Q

Where are growth regulators produced

A

In the meristem

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10
Q

Tropism

A

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

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11
Q

Positive tropism

A

Occurs when the growth is towards a stimulus

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12
Q

Negative tropism

A

Occurs when the growth is away from the stimulus

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13
Q

Name the 4 types of tropisms

A

Phototropism
Geotropism
Hydrotropism
Chemotropism

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14
Q

Photo tropism

A

Change in growth of a plant in Responce to light

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15
Q

Geotropsim

A

Change in growth of a plant in respond to gravity

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16
Q

Hydrotropism

A

Change in growth of a plant in Responce to water

17
Q

Chemotropism

A

Change in growth of a plant in Responce to chemicals

18
Q

Growth regulators

A

Chemicals that change the growth of a plant

19
Q

Growth promoters

A

Cause increased plant growth

20
Q

Name a growth promoter

A

Auxins

21
Q

Growth inhibitors

A

Reduce or stop growth

22
Q

Name a growth inhibitor

A

Tehehe

23
Q

IAA

A

Indoleacetic acid

24
Q

IAA

A

The best known auxin

25
Q

Effects of auxins are to cause

A

Tropisms
Fruit formation
Root formation and growth

26
Q

Functions of auxins

A

Stimulating growth
Developing fruit
Causing phototropism

27
Q

Growth inhibitors include

A

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

28
Q

Ethene

A

Gas that ripens fruit

29
Q

Commercial growth regulators are used to

A

Ripen fruits

Stimulate root formation (rooting powders)

30
Q

Plant protection methods

A

Anatomical / structural (bark)

Chemical (stress proteins)

31
Q

Name a stress protein

A

Phytoalexins

32
Q

When do plants produce stress proteins

A

When a plant is infected by a micro organism

33
Q

Name a way in which stress proteins act

A

Damage microorganisms by attacking their cell wall

Biology (29 decks)

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