What is micropropagation?

Small tissues of plant can be used to grow whole plants.

Why does auxin travel from the tip of the plant to the stem and downwards?

To maintain concentration gradient.

What are the functions of auxin efflux pumps?

Pump auxin out of the cell and distribute to where needed.

What is another function of lateral meristems besides growth in vascular cambium?

Replace damaged apical meristems produce flowers or leaves.

What is contained in the growth medium (agar) to allow plant to grow?

Plant hormones, Minerals and sucrose

What is primary growth?

Growth by apical meristem to increase stem length.

Cell enlargement, Cell division

Plant grows upwards, Roots grows into the ground

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9.3 Plant biology - Growth

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IB Biology HL topic 9 Plant Biology - 9.3 Growth

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Questions 13

Answers

1
What is micropropagation?
Plant growth from dead sample (PLANT RESURRECTION)
Cloning from an explant.
A little propagation
Small tissues of plant can be used to grow whole plants.
2
Why does auxin travel from the tip of the plant to the stem and downwards?
To inhibit growth.
To maintain concentration gradient.
To get away from the light.
To get to the roots.
3
Auxin effux pumps are produced in cells where needed.
True
False
4
What condition is essential for micropropagation?
Light
Cold temperature
Clean
Sterilised
5
What are the functions of auxin efflux pumps?
Pump auxin out of the cell and distribute to where needed.
Helps the transport of auxin from the tip to the shaded area
Accepts auxin from other cells
Act as carrier proteins for auxin to be pump into the cell.
6
Undifferentiated meristem cells in plants allows...
Growth from phototropism
Plant equality.
Indeterminate plant growth
Increase the size of the plant cell.
7
What is another function of lateral meristems besides growth in vascular cambium?
Produce auxin for plant growth.
Accepts auxin by auxin receptors for cell elongation.
Replace damaged apical meristems produce flowers or leaves.
Supports apical growth by extending apical meristem in roots
8
What is contained in the growth medium (agar) to allow plant to grow?
Undifferentiated cells
Plant hormones
Minerals and sucrose
Fertiliser
9
What is primary growth?
Apical growth to produce shoots and branches.
Growth by lateral meristem to increase vertical size.
Growth by apical meristem to increase stem length.
Growth by apical meristem to increase horizontal size.
10
Auxin has different responses to certain gene expressions and can alter them accordingly.
True
False
11
Tropisms affect...
Cell enlargement
Amount of auxin produced.
Cell division
The environment
12
What happens to the cellulose fibres in cell walls as levels of auxin in the cell increase?
They make the cell become turgid
They loosen
They break
The tighten
13
Geotropism is...
Growth in stem of the plant
Plant grows upwards
Roots grows into the ground
Plant grows towards the light

9.3 Plant biology - Growth Flashcards | StudBud