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Question 1

Name all 3 plant hormones.

Answer 1

Auxins

Gibberellins

Ethene

Question 2

What does Gibberellins do?

Answer 2

Gibberellins are plant hormones that cause seeds to germinate (start
growing) to grow shoots and roots.

Question 3

What does Ethene do?

Answer 3

Ethene gas is a plant hormone that causes fruit to ripen.

Question 4

What uses do Plant hormones have in gardening and agriculture?

Answer 4

Growing cuttings
 Ripening fruit
 Killing weeds

Question 5

How can hormones cause weeds to die?

Answer 5

Most weeds have broad leaves.

Selective weedkillers = contain
artificial auxins that cause rapid
growth in plants with broad leaves.

The weeds with broad leaves absorb
more, grow much faster, causing
them to die.

Question 6

What are the advantages of using
rooting powders?

Answer 6

cause cuttings them to grow roots faster

Question 7

What are the Uses of gibberellins?

Answer 7

Gibberellins can be used to cause seed germination.
o Periods of darkness or cold before germination can be skipped.
 Flower growers use gibberellins to override photoperiodism.
 Used to produce seedless fruit.
 Production of larger fruit.

Question 8

What are Photoperiodism plants?

Answer 8

plants respond to the number of hours of daylight.

Question 9

How are hormones used to ripen fruit?

Answer 9

 Fruit is often picked before it is fully ripe.

 Fruit often has to travels thousands of
miles from where it is picked to where it is
sold in the shops.

o Fruits are harvested before they are
fully ripe so that they don’t spoil
during transportation.

 When the fruit reaches its destination, it
can then be sprayed with artificial plant
hormones to encourage ripening.

Question 10

Why should you wash your fruits before eating them?

Answer 10

Remember to wash fruit before eating it since it may still
have artificial hormones or other chemicals sprayed on it