5.4 Plant Hormones

Question 1

(Ripening) which hormone is involved in the ripening of climacteric fruit?

Answer 1

Ethene

Question 2

(Ripening) ripening is linked to a peak of ethene production triggering increased what?

Answer 2

Respiration and other reactions

Question 3

(Ripening) what type of fruits are climacteric?

Answer 3

Bananas, tomatoes

They continue to ripen after harvesting

Question 4

(Ripening) ethene is used in production of climacteric fruit for who?

Answer 4

Grocers and supermarkets

Question 5

(Ripening) fruits are harvested before ripe they are then what?

Answer 5

Cooled
Stored
Transported

Question 6

(Ripening) when needed for sale plants are exposed to ethene ensuring what?

Answer 6

Each fruit ripens at the same time ready for sale

Question 7

(Ripening) using ethene in this way has what benefits?

Answer 7

Increases time to be sold

Prevents waste during transport

Question 8

(Ripening) if part of a bunch of green bananas are placed in a bag with a ripe banana and the other part without what will happen?

Answer 8

Bunch with the ripe banana will ripen faster due to ethene from the ripe one stimulating ripening

Question 9

(Hormonal weedkillers) what are weeds?

Answer 9

Plants growing where they aren’t wanted

They can interfere with crop plants by competition

Question 10

(Hormonal weedkillers) scientists have developed what that acts as weedkillers?

Answer 10

Synthetic auxins

Question 11

(Hormonal weedkillers) many crops are what type of plants?

Answer 11

Narrow leaves monocots

Question 12

(Hormonal weedkillers) most weeds are what type of plants?

Answer 12

Broad leaves dicots

Question 13

(Hormonal weedkillers) synthetic dicot auxins are applied as weed killer and are absorbed by what?

Answer 13

Broad leaves plants increasing growth rate so it is so unsustainable they die

Question 14

(Hormonal weedkillers) narrow leaved crops continue to do what?

Answer 14

Grow normally

Question 15

(Hormonal weedkillers) what benefits are there if synthetic auxins?

Answer 15

Simple and cheap to produce

Low in toxicity to animals

Question 16

(Other uses) what hormones can be used in the production of seedless fruit?

Answer 16

Auxins

Question 17

(Other uses) what hormone is used to promote fruit dropping in plants?

Answer 17

Ethene

Question 18

(Other uses) cytokinins can be used to prevent what?

Answer 18

Ageing in ripening fruit

Question 19

(Other uses) gibberellins can be used to do what?

Answer 19

Delay ripening and ageing
Improve size and shape of fruit
Speed up melting process in beer brewing

Question 20

(Hormone roofing powders) application of auxins to cut shoots stimulates what? And what does this help do?

Answer 20

Roots

Making it easier to propagate new plants from cuttings

Question 21

(Hormone roofing powders) dipping plants into hormone roofing powder increased chances of what?

Answer 21

Roots forming

Question 22

(Hormone roofing powders)many plants are grown by micropropagation what is this?

Answer 22

Producing thousands of new plants from a few cells of the original

Question 23

(Hormone roofing powders)plant hormones control production of the what?

Answer 23

Mass of new cells

Differentiation of clones into new plants