plant hormones

Auxins are responsible for _____________ of a plant

• Colour change

• Watering

• Phototropism

• Growth

Tags

NGSS.MS-LS1-5

What happens when you place an over ripe banana in a fruit bowl with other fruit?

• Nothing will happen

• The other fruit will grow in size

• Ethylene gas will cause the fruit to grow mold

• Ethylene gas will cause the other fruit to ripen

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Phototropism is

• The plant response to water

• The plant response to light

• The plant response to gravity

• The plant response to soil

Tags

NGSS.MS-LS1-5

Geotropism is

• The plant response to light

• The plant response to water

• The plant response to soil

• The plant response to gravity

Causes the enlargement of fruits

• abscisic acid

• auxin

• cytokinins

• gibberellin

• ethylene

Causes apical dominance

• abscisic acid

• auxin

• cytokinins

• gibberellin

• ethylene

Inhibits cell division

• abscisic acid

• auxin

• cytokinins

• gibberellin

• ethylene

Tags

NGSS.HS-LS1-4

What is the role of auxin that causes a plant to bend towards light?

• The concentration of auxin in the plant increases when there is light.

• Auxin causes uniform growth on every stem.

• Auxin causes cells that are on the dark side to grow faster.

• Auxin causes the increase in the number of plant cells.

Tags

NGSS.MS-LS1-5

The figure above shows four coleoptiles P, Q, R and S that are exposed to unilateral light. After two days, which coleoptile will move towards the light?

• P only.

• R only.

• P and R only.

• P, Q and S only.

Tags

NGSS.MS-LS1-5

The figure below above shows an experiment to study the effect of auxin towards the growth of the coleoptiles. Which of the following conclusions are true about the experiment?

I Auxin is produced at the tip of the

coleoptiles and diffuses to the bottom to stimulate

growth.

II The supply of auxin is cut off in the

dark.

III Auxin cannot penetrate a mica plate.

IV Auxin can diffuse through a block of

agar-agar.

• I, II and III only.

• I, III and IV only.

• II, III and IV only.

• I, II, III and IV.

Tags

NGSS.MS-LS1-5