Q. 285.0( 2 Votes )
A potted plant is kept horizontally for a considerable time. The three positions of the parts A and B of the potted plant are shown in the following figures:
(a) Which figure shows the correct position taken by the parts A and B of the plant?
(b) What type of phenomenon is exhibited by the figure chosen in (a) above?
(a) Figure (ii) shows the correct position taken by the parts A and B of the plant. As the aerial parts of the plants show positive phototropism while roots show positive geotropism.
(b) Geotropism is exhibited by the figure chosen in (A) above.
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Following are the two examples of plant movement.
(i) Which stimulus is common for movement in both the cases?
(ii) Does the movement take place towards the point where the stimulus is received? Mention separately for both plants.
(iii) Give one reason for the movement is each case.All In One Science
A plant in the laboratory is given an increased dose of a hormone, which promotes the development of seedless fruits. Identify the hormone and write its other two functions.All In One Science
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How does phototropism occur in a plant stem (or shoot)? Explain with the help of labelled diagrams.Lakhmir Singh & Manjit Kaur- Biology