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प्रश्न
What is meant by ‘positive geotropism’ and ‘negative geotropism’? Give one example of each type. Draw a labelled diagram to illustrate your answer, indicating the plant part, which shows positive geotropism, and the plant part, which shows negative geotropism.
उत्तर
If the movement of the plant parts is towards the pull of gravity, it is known as positive geotropism; whereas if the movement of the plant parts is in the direction opposite to the pull of gravity, it is known as negative geotropism.
The movement of roots towards the soil is an example of positive geotropism, whereas the movement of plant stems away from the soil in the upward direction is an example of negative geotropism.
संबंधित प्रश्न
Give the scientific terms used to represent the Winding of tendril around a support.
Name the plant organ which is positively geotropic
Name five stimuli which act on plants. Name the type of tropism produced by each one of these stimuli.
What is meant by positive tropism and negative tropism? Explain with examples.
The bending of the shoot of a plant in response to light is called :
(a) geotropism
(b) phototropism
(c) thigmotropism
(d) photonasty
Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called:
State whether true or false. If false, correct the statement.
The response of a part of plant to the chemical stimulus is called phototropism.
The stimulus in the process of thigmotropism is:
Give one example of geotropism.
The growth movement of plant parts which occurs due to touch stimulus is called ______.
