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प्रश्न
Define the following term:
Clinostat
उत्तर
The clinostat is a device that employs rotation to counteract the effects of gravitational force on plant growth. It is composed of two plant pots: one is stationary, while the other is rotated. The rotating plant demonstrates positive geotropism, as it is equally exposed to gravity from all directions, whereas the stationary plant exhibits negative geotropism, growing in the opposite direction.
संबंधित प्रश्न
How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
How does phototropism occur in plants?
Where is the auxin hormone made in a plant stem?
What is the stimulus in geotropism?
To which directional stimuli do shoots respond?
Define phototropism. Give one example of phototropism.
How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.
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?
What is chlorophyll?
Roots of plants are:
