Plant Growth Responses and Tropisms

The video tutorial explores phototropism and geotropism in plants through an experiment. It begins with an introduction to these tropisms, followed by a list of materials required for the experiment. The procedure involves setting up two plants in boiling tubes, one upright and the other inverted, and observing their growth over four days. Observations reveal that stems exhibit positive phototropism and negative geotropism, while roots show negative phototropism and positive geotropism. The conclusion summarizes these findings, explaining the directional growth of stems and roots in response to light and gravity.

What are the two main types of tropisms studied in this experiment?

• Hydrotropism and thigmotropism

• Geotropism and thigmotropism

• Phototropism and geotropism

• Phototropism and hydrotropism

Which materials are required for the experiment?

• Two unbranched plants, glue, and two boiling tubes

• Two branched plants, adhesive tape, and two boiling tubes

• Two unbranched plants, adhesive tape, and two boiling tubes

• Two branched plants, glue, and two boiling tubes

How should the boiling tubes be positioned in the experiment?

• Tube A should be upside down, Tube B upright

• Both tubes should be upright

• Tube A should be upright, Tube B upside down

• Both tubes should be upside down

What is the purpose of sealing the boiling tubes with adhesive tape?

• To keep the plants in place

• To prevent air from entering

• To allow sunlight to enter

• To prevent water from trickling out

On which days should the plants be observed?

• Day 1, Day 3, and Day 5

• Day 1, Day 2, Day 3, and Day 4

• Day 2, Day 3, and Day 4

• Day 1, Day 2, and Day 5

What is observed about the stem in test tube A?

• It grows downwards and away from light

• It grows vertically upwards and bends towards the light

• It grows horizontally and away from light

• It remains unchanged

How do the roots in both test tubes respond to gravity?

• They do not respond to gravity

• They grow horizontally

• They grow towards gravity

• They grow away from gravity

What is positive phototropism?

• When plant roots grow towards light

• When plant stems grow towards light

• When plant stems grow away from light

• When plant roots grow towards gravity

What is negative geotropism?

• When plant roots grow away from light

• When plant roots grow towards gravity

• When plant stems grow towards gravity

• When plant stems grow away from gravity

What conclusion can be drawn about root growth in relation to light?

• Roots grow towards light

• Roots exhibit negative phototropism

• Roots exhibit positive phototropism

• Roots do not respond to light