Plant Tropisms and Hormones Quiz

What is the response of a plant to light called?

• Hydrotropism

• Thigmotropism

• Geotropism

• Phototropism

Which plant hormone is responsible for promoting cell elongation in response to light?

• gibberellin

• ethylene

• auxin

• cytokinin

How does phototropism help a plant in its growth and development?

• It has no impact on the growth and development of the plant.

• It helps the plant grow towards a light source for photosynthesis and development.

• It causes the plant to shrink away from light to protect itself from sunburn.

• It helps the plant grow towards a heat source for warmth and development.

What is the response of a plant to gravity called?

• chemotropism

• gravitropism

• photosynthesis

• hydrotropism

Which plant hormone is responsible for inhibiting the growth of lateral buds and promoting root growth in response to gravity?

• Cytokinin

• Auxin

• Gibberellin

• Abscisic acid

Explain how geotropism helps a plant in its growth and development.

• Geotropism helps a plant by causing its roots to grow sideways into the soil for water and nutrients.

• Geotropism helps a plant by making its stems grow downward into the soil for water and nutrients.

• Geotropism helps a plant by causing its roots to grow upward towards the light for photosynthesis.

• Geotropism helps a plant by guiding its roots to grow downward into the soil for water and nutrients, and its stems to grow upward towards the light for photosynthesis.

What is the response of a plant to touch called?

• Geotropism

• Thigmotropism

• Hydrotropism

• Phototropism

Which plant hormone is responsible for promoting cell division and tissue differentiation in response to touch?

• auxin

• gibberellin

• cytokinin

• ethylene

How does thigmotropism help a plant in its growth and development?

• It helps the plant respond to changes in light intensity

• It helps the plant respond to touch or contact with objects in its environment.

• It helps the plant respond to changes in temperature

• It helps the plant respond to changes in soil pH

What is the response of a plant to water called?

• Thermotropism

• Geotropism

• Phototropism

• Hydrotropism