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प्रश्न
How are tropic movements helpful to plants? Explain with an example.
उत्तर
Tropic movements are helpful in the growth of plants.
Phototropism is an example of tropic movements. The stems of plants respond to sunlight by growing towards it. The plants also turn their leaves to face the sun. This enables their leaves to get as much sunlight as possible that is required for photosynthesis.
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संबंधित प्रश्न
Where is the auxin hormone made in a plant stem?
What is meant by 'tropisms' (or tropic movements)? Explain with an example.
Which of the following terms denotes the movement of the root of a plant towards moisture in the soil?
(a) thigmotropism
(b) chemotropism
(c) hydrotropism
(d) geotropism
The top part A of the flask-shaped reproductive organ X in the flower of a plant secrets a surgery substance into its lower part B which goes towards the bottom part C of the flask-shaped organ. When a tiny grain D coming from the top part E of another reproductive organ Y i the flower falls on part A, it grows a long tube F through the organ X i response to the sugary substance and reaches the bottom part C of flask-shaped organ to carry out fertilisation.
(a) Name parts (i) organ X, and (ii) organ Y, inside the flower?
(b) Name parts (i) A (ii) B, and (iii) C, of flask-shaped organ.
(c) Name (i) grain D, and (ii) part E of organ Y.
(d) Name the tube F.
(e) What is the phenomenon of growing a long tube in response to sugary substance in the process of fertilisation in a flower known as?
Name the stimulus which causes the following movements in plants.
phototropism, thigmotropism, hydrotropism and geotropism
A growing seedling is kept in the dark room. A burning candle is placed near it for a few days. The tip part of the seedling bends towards the burning candle. This is an example of ______.
Thigmonasty can be seen in ______.
What does a Mimosapudica plant do in response to touch? What is the phenomenon known as?
Give an example for the movement of plant part which is very quick and can be observed easily.
Write the scientific terms used to represent.
Leaves fold up and droop in touch-me-not plant Mimosa pudica
