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प्रश्न
Name the stimulus which causes the following movements in plants.
phototropism, thigmotropism, hydrotropism and geotropism
उत्तर
|
Tropic movement |
Stimulus |
|
Phototropism |
Light |
|
Thigmotropism |
Touch |
|
Hydrotropism |
Water |
|
Geotropism |
Gravity |
APPEARS IN
संबंधित प्रश्न
Name the type of chemical substances that control the growth in plants.
Give the scientific terms used to represent the Bending of a shoot towards light.
Name the two types of tendrils.
P and Q are two types of plants having weak stems which cannot stand upright on their own. The plants P and Q have organs R and S respectively which can grow towards any support which they happen to touch and wind around that support. It is observed that organ R originates from the leaves of the plant whereas organ S originates directly from the stem of the plant.
(a) What is (i) R, and (ii) S?
(b) What is the name of growth movement exhibited by the organs R and S?
(c) Name the stimulus involved in this case.
(d) State whether the behaviour of organs R and S is a tropic movement or a nastic movement.
(e) Name one plant like P and another plant like Q.
Answer the following question.
What is tropism?
A student accidentally places her hand on the flame of the candle and quickly pulls her hand away. The flame represents:
The stimulus in the process of thigmotropism is:
The Scientific term used to represent the bending of roots toward water is called geotropism.
Name a hormone which is responsible for phototropism
The diagram given alongside shows a type of tropism. Study the same and answer the questions that follow:
- Name and define the type of tropism shown in the diagram.
- Label the guidelines (1) to (4).
- Name two effective stimulants that help in the growth of part (2).
- Name two groups of plants where part (2) grows towards gametophyte with the help of the stimulants mentioned in (c).
