A growing seedling is kept in a dark room. A burning candle is placed near it for a few days. The top part of seedling bends towards the burning candle. This is an example of:(a) chemotropism (b) hydrotropism (c) phototropism (d) geotropism
(c) Phototropism.
The process of bending of the shoot (upper part of the plant) towards the light is known as phototropism.
Related Articles What is the stimulus in : (a) phototropism ? (b) geotropism ? (c) chemotropism ? (d) hydrotropism ? (e) thigmotropism ?
The movement of a plant part in response to the force of attraction exerted by the earth is called:(a) hydrotropism (b) geotropism (c) chemotropism (d) phototropism
With the help of an experiment show that oxygen is necessary for burning of a candle.
(a) What is a flame? What type of substance, on burning, give a flame?(b) What is the difference between the burning of a candle and the burning of a fuel like coal.
A burning candle whose flame is 1.5 cm tall is placed at a certain distance in front of a convex lens. An image of candle flame is received on a white screen kept behind the lens. The image of flame also measures 1.5 cm. If f is the focal length of convex lens, the candle is placed:(a) at f (b) between f and 2f (c) at 2f (d) beyond 2f
Look at figure 6.1 which shows three situations(a) a burning candle(b) an extinguished candle(c) melting wax."
The growth of a pollen tube towards the ovule caused by a sugary substance as stimulus is an example of: (a) phototropism (b) chlorotropism (c) gravitropism (d) chemotropism
Why the flame of burning LPG gas is blue in colour, and the flame of a burning candle is orange and yellow?
Explain why, when a burning candle is covered with an inverted gas jar, the candle gets extinguished after sometime.
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 movement of sunflower in accordance with the path of the sun is due to:(a) photonasty (b) phototropism (c) hydrotropism (d) chemotropism
With the help of an experiment, show that oxygen is necessary for burning of the candle.
The growth movement of a plant part in response to the touch of an object is called:(a) thigmonasty (b) hydrotropism (c) thigmotropism (d) geotropism
A potted plant is growing in a transparent glass jar. In this plant, X and Y are the two growing parts having a lot of meristematic tissue. It is observed that the part X of this plant exhibits positive geotropism but negative phototropism. On the other hand, part Y of this plant exhibits negative geotropism but positive phototropism.(a) Name the part X of plant.(b) Name the part Y of plant.(c) Which part of the plant, X or Y, will exhibit positive hydrotropism?(d) Which part of the plant, X or Y, can have tendrils on it ?(e) Which phytohormone causes the part X to exhibit negative phototropism?
The burning of paper is a/an ________.
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