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GH Unit 3:4 Growth Regulators

Total questions: 10

Worksheet time: 30mins

Name
Class
Date
1.

Which one of these hormones does NOT stimulate plant growth?

a)

Ethylene

b)

Gibberellins

c)

Auxins

d)

Cytokinins

2.

This is known as the plant's self destruct mechanism:

a)

Apical Dominance

b)

Ethylene

c)

Cytokinins

d)

Allelopathy

3.

When one shoot becomes the leader, or tallest stem.

a)

Allelopathy

b)

Gibberellins

c)

Auxins

d)

Apical Dominance

4.
a)

A: Cytokinins

B: Auxins

b)

A: Auxins

B: Cytokinins

c)

A: Gibberellin

B: Ethylene

d)

A: Abscisic Acid

B: Ethylene

5.

Prevents stems of flowers from getting tall and gangly:

a)

Chemical Retardant (PGRs)

b)

Gibberellic Acid

c)

Stimulants

d)

Dwarfing Rootstock

6.

What word means "of each other" "to suffer?"

a)

Gibberellins

b)

Apical dominance

c)

Allelopathy

d)

Auxins

7.

Synthetic rooting hormones that you can buy at the store typically contain:

a)

Auxins

b)

Cytokinins

c)

Ethylene

d)

Chemical Retardants

8.

True or False: Gibberellins make stems taller

a)

True

b)

False

9.

When you place a ripe banana next to a bunch of green bananas the green bananas will ripen and turn yellow faster than normal. This happens because the brown banana is releasing ______________, which signals the green bananas to accelerate the ripening process.

a)

Auxins

b)

Cytonkinins

c)

Gibberellins

d)

Ethylene

10.

True or False: An inhibitor is a substance which slows down or prevents a particular chemical reaction or other process.

a)

True

b)

False