Science Video Response - Day 12

What is the term for a plant's growth response towards or away from a stimulus?

• Movement

• Tropism

• Photosynthesis

• Respiration

When a plant grows towards a stimulus, what type of tropism is it showing?

• Negative tropism

• Neutral tropism

• Positive tropism

• Reverse tropism

If a plant grows away from a stimulus, what is this response called?

• Positive tropism

• Negative tropism

• Neutral tropism

• Forward tropism

Which type of tropism describes a plant's growth response to touch?

• Phototropism

• Gravitropism

• Thigmotropism

• Hydrotropism

Which of the following is an example of positive thigmotropism?

• Roots growing downwards

• Stems growing towards light

• Vines coiling around a pole

• Flowers opening in the morning

What is the term for a plant's growth response towards light?

• Gravitropism

• Thigmotropism

• Hydrotropism

• Phototropism

Which part of a plant typically shows positive gravitropism by growing downwards?

• Leaves

• Stems

• Flowers

• Roots

What are the chemicals that plants produce to affect their growth and development called?

• Nutrients

• Hormones

• Enzymes

• Vitamins

Which important plant hormone is known to speed up the rate of plant cell growth?

• Cytokinin

• Gibberellin

• Auxin

• Ethylene

How does auxin cause a plant stem to bend towards light?

• It makes the cells on the sunny side grow longer.

• It makes the cells on the shaded side grow longer.

• It makes the entire stem shrink.

• It makes the plant turn its leaves away from the light.