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Ag Assessment Term 1/2 Year 12 > Ag Assessment > Flashcards

Ag Assessment Flashcards

1
Q

What is the effect is auxins

A

They cause cell elongation
Secondary thickening of stems and roots
Fruit development
Dominance of the terminal bud

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2
Q

What are the effect of gibberellins

A

Stem elongation
Flowering
Germination
Help regulate growth

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3
Q

What are the effect of cytokinesis

A

They promote cell division
Root growth
They affect apical dominance

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4
Q

What are the effects of ethylene

A

Promotes the ripening of fruit
Promotes or inhibits senescene

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5
Q

What are the effects of abscisic acids

A

Reduces cell division
Inhibits growth
Closes plan stomata when there is a water shortage

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6
Q

How are auxins used to manage plan production

A

Selective weed killers
Rooting powders

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7
Q

What is a selective weed killer and how is it used

A

A selective weed killer that contains auxins cause the weeds to grow extremely quickly and die.

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8
Q

How do rooting powders work

A

Plant cuttings are dipped into the rooting powder before planting, which then helps the producers be able to control growth

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9
Q

How are gibberellins used to manage plant production

A

End seed dormancy
Promote flowering

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10
Q

How do gibberellins end seed dormancy

A

They increase the level of certain enzymes to break seed dormancy so seeds can germinate

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11
Q

How do gibberellins promote flowering

A

They stimulate elongation of the stem and flowering so it grows faster

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12
Q

How are cytokines used to manage plant production

A

Plant growth
Development of lateral buds

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13
Q

How do cytokines develop lateral buds

A

They are applied to plants when the terminal bud is excessive because the use of cytokines can reduce this dominance

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14
Q

How do cytokines help plant growth

A

They are often used because they have a slow response
It’s more effective when the plant has been under stress

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15
Q

How is ethylene used to manage plant production

A

Ethylene lamps
Feminising effect

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16
Q

How are ethylene lamps used to manage plant production

A

Colour development
Ripening of fruits

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17
Q

How is the feminising effect used in plant production

A

Can be used to increase the number of female flowers in plants to induce fruiting

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18
Q

How is absicic acid used to manage plant production

A

Environmental stress response
Seed maturation and dormancy

19
Q

How does absicic acid help with environmental stress response

A

E.g During drought it helps regulate water balance

20
Q

How does absisic acid help with seed maturation and dormancy

A

Promotes the synthesis of storage proteins and enforced a period of seed dormancy, this prevents premature germination during unseasonably mild conditions

21
Q

How do weed killers benefit plant production

A

Auxin based weed killers selectively target weeds without harming desirable plants

22
Q

How do rooting powders benefit plant production

A

They promote root growth and it speeds up plant production

23
Q

How does ending seed dormancy help plant production

A

Breaking seed dormancy determines the timing of germination and is essential for ensuring plant survival and ag production

24
Q

How does promoting flowering help plant production

A

This can help speed up plant production overall

25
Q

How does the development of lateral buds help plant production

A

It can increase photosynthesis and contribute to a bushier plant

26
Q

How do ethylene lamps help with plant production

A

Enhances growth and stress resistance

27
Q

How does the feminising effect help with plant production

A

It increases the number of female plants which increases breeding

28
Q

How does seed dormancy and maturity help with plant production

A

Prevent premature germination which saves plants

29
Q

How does the environmental stress response help with plant production

A

It helps plants survive and prepare for hard times

30
Q

What is an example of an auxin product

A

2,4 dichlorophenoxyacetic acid
Mix 3 tablespoons of the concentrate with 3 gallons of water
Use with a portable pump sprayer to spray on weeds

31
Q

What is an example of a gibberellins product

A

Gibberellins acid quick dissolve powder
Add 100mg of powder to a 250 ml beaker and add 80 ml of water

32
Q

What is an example of a cytokines product

A

Kinetin
30 mg per litre
Applied as a spray

33
Q

What is an example of an ethylene product

A

Ethylene absorbers
Don’t have a ratio

34
Q

What is an example of an absicic acid product

A

Absicic acid drench
500 mg to 1 litre

35
Q

What is selective breeding

A

Choosing 2 plants with different desirable traits and breeding them together in hopes that the offspring with have those traits
E.g cabbage and broccoli come from the same plant but we’re both selectively bred to have different traits

36
Q

What is hybridisation

A

This is a process of combining the genetic material of 2 or more different plants to produce a new plant with desirable traits
E.g tangelo which is a cross between two citrus plants

37
Q

What is genetic engineering

A

This is a process of modifying the plant genomes to create new traits or enhance existing ones.

38
Q

What does genetics engineering involve

A

It involves isolating and cloning the desired genes, introducing them into plant cells and integrating them with the plant DNA
E.g the poplar trees which have been genetically engineered to fight pollution

39
Q

What is a plant that was bred for quality

A

Tomato’s

40
Q

How were tomato’s bred for quality

A

The flavour savour tomato which was genetically modified through gene slicing. This resulted in a longer shelf life, fungal resistance and made it possible for the fruit to be picked ripe

41
Q

What was a plant bred for yield

A

Wheat

42
Q

How was wheat bred for yield

A

Genetics engineering and multiple years of selective breeding. The gene that was used was a semi-dwarf gene to create shorter stemmed varieties which resulted in less shattering and optimum height

43
Q

What is a plant that was bred for environmental adaptation

A

Cotton

44
Q

How was cotton bred for environmental adoption

A

It has been genetically engineered and selectively bred to be resistant to insects and have abiotic stress relief
E.g bt- transgenic cotton

Ag Assessment Term 1/2 Year 12 (1 decks)

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