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?
(a) The part X is the root.
(b) The part Y is the shoot.
(c) The part X (root) will exhibit positive hydrotropism.
(d) The part Y (shoot) could have tendrils on it.
(e) The phytohormone, auxin causes part X (root) to exhibit negative phototropism.
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- (a) Define geotropism. Give one example of geotropism.(b) What is meant by 'positive geotropism' and 'negative geotropism? Give one example of each type. Draw a labelled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shows negative geotropism.(c) Name one plant part which exhibits positive thigmotropism.
- The plant part which exhibits negative geotropism is:(a) root (b) stem (c) branch (d) leaves
- Which part of the plant is known as the food factory of the plant?
- What is the name of the part of the plant which transfers mineral and water to all parts of the plant?
- Name the part of the plant which produces food. Name the process.
- 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
- From which part of the plant, cotton and jute are obtained?
- Mention male and female part of a plant.
- Name one example of the movement of a plant part which is very quick and can be observed easily.
- 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
- Which part of the jute plant is used for getting jute fibre?FlowerStemFruitLeaf
- When a broken piece of the stem of a plant X is planted in the soil, a new plant grows from it in a week's time. The leaves of plant X also have many small entities Y in their margins which can fall to the ground alone or alongwith leaves and grow into new plants.(a) Name a plant which X could be. (b) What are the entities Y present on the leaves of X known as? (c) Name a plant other than X which can be reproduced from its leaves. (d) Name a common plant grown in many homes which can be propagated from its broken stems like plant X. (e) Name a kind of dormant organs present in dry stems of old grass plants lying in the fields which get activated and produce green grass plants after the rains.
- What is so special about the leaves, that they can synthesize food, but other part of the plant cannot?
- The top part A of the flask-shaped reproductive organ X in the flower of a plant secretes 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 in the flower falls on part A, it grows a long tube F through the organ X in response to the sugary substance and reaches the bottom part C of flask-shaped organ to carry out fertilisation.(a) What is (i) organ X, and (ii) organ Y, inside the flower?(b) Name parts (i) A (ii) B, and (iii) C, of flask-shaped.(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 a sugary substance in the process of fertilisation in a flower known as?
- Name the plant part :(a) which bends in the direction of gravity but away from light(b) which bends towards light but away from the force of gravity
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