Lesson Worksheet: Plant Tropisms Biology

In this worksheet, we will practice defining the term 𝘵𝘳𝘰𝘱𝘪𝘴𝘮 and describing examples of common tropisms found in plants.

Q1:

Complete the following statement: The response of plant roots to grow in the direction of a water source is known as .

  • Aphototropism
  • Bhydrotropism
  • Cgravitropism
  • Dthigmotropism

Q2:

Complete the following statement: The response of a plant to grow toward a light source is known as .

  • Agravitropism
  • Bhydrotropism
  • Cphototropism
  • Dthigmotropism

Q3:

Plant roots are positively gravitropic; what does this mean?

  • AThey are positively attracted to soil.
  • BThey grow toward the direction of gravity.
  • CThey grow away from other plant roots.
  • DThey grow in the opposite direction to sunlight.

Q4:

Plant shoots are positively phototropic; what does this mean?

  • AThey grow toward a light stimulus.
  • BThey grow toward other brightly colored plants.
  • CThey grow away from bright sunlight.
  • DThey reflect the majority of the wavelengths of light.

Q5:

Which of the following is correct about plant roots?

  • APlant roots are positively phototropic and negatively gravitropic.
  • BPlant roots are negatively phototropic and positively gravitropic.
  • CPlant roots are positively hydrotropic and negatively gravitropic.
  • DPlant roots do not display any major tropisms.

Q6:

Which of the following is correct about plant shoots?

  • APlant shoots are negatively phototropic and positively gravitropic.
  • BPlant shoots are negatively hydrotropic and positively gravitropic.
  • CPlant shoots are positively phototropic and negatively gravitropic.
  • DPlant shoots do not display any major tropisms.

Q7:

In an unevenly irrigated soil, how would auxins affect the growth of the root and the stem of a plant?

  • AThe root would grow in the direction where water is abundant and so would the stem.
  • BThe root would grow in the direction where water is abundant while the stem would grow upwards.
  • CThe root would grow in the direction where water is abundant while the stem would grow in the opposite direction.
  • DBoth would grow without changing direction regardless of the abundance of water.

Q8:

Considering the plant in the diagram, what is the expected result of directing light on only one side of the plant?

  • AThe stem will grow and bend towards the light, while the root will keep growing downwards away from the light.
  • BThe stem and root will both grow and bend towards the light.
  • CThe root will grow and bend towards the light, while the stem will grow and bend away from the light.
  • DThe stem and root will both grow and bend away from the light.

Q9:

Which of the following best defines tropism?

  • ATropism is the response of a plant to grow toward or away from a stimulus.
  • BTropism is the mechanism by which a plant increases its cell division and growth.
  • CTropism is the response of a plant to external stimuli via its nervous system.
  • DTropism is the movement of a plant toward a more hospitable environment.

Q10:

Complete the following statement: The response of a plant to grow in the direction of gravity is known as .

  • Aphototropism
  • Bhydrotropism
  • Cthigmotropism
  • Dgravitropism

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