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प्रश्न
What is the stimulus in phototropism?
उत्तर
The stimulus in phototropism is Light.
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संबंधित प्रश्न
What does a stem (or shoot) do in response to light? What is this phenomenon known as?
Tendrils wind around a support in response to ______.
Name the plant organ which is positively hydrotropic.
Why is the closing of a dandelion flower at dusk (when it gets dark) not a tropism?
What is the difference between thigmotropism and thigmonasty? Name one plant which exhibits thigmotropism and one plant which exhibits thigmonasty. What behaviour (or responses) of these plants make you think that they exhibit thigmotropism and thigmonasty respectively?
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?
In tropic movements, plant parts move
Which flowering plant shows a photo nasty just opposite to that of a Dandelion?
Why do roots of halophytes show negative geotropism?
