Define the following in Brief :
1. Types of Tropism in plants
2. Photo attached
Define the following in one line :
1. Geotropism
2. Hydrotropism
3. Thigmotropism
4. Chemotropism
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Answers
Define the Following Briefly :
1. Types of Tropism in plants :
Based on the stimuli, Tropism can be classified as follows :
Phototropism : Movement of a Plant part towards light. Eg : Shoot of a Plant.
Geotropism : Movement of a Plant in response to Gravity. Eg : Root of a Plant.
Hydrotropism : Movement of a Plant or Part of a Plant towards Water. Eg : Root of a Plant
Thigmotropism : Movement of a part of plant in response to chemicals. Eg : Growth of a pollen tube in response to sugar present on the stigma.
Tropism is generally termed Positive if growth is towards the signal and Negative if it is away from the signal.
2. Photonasty :
Movement of a part of the plant in response to light. Eg : Taraxacum, Officinale, Blooms in morning and closes in the evening.
Similarly, Ipomea alba ( Moon flower ), opens in the night and closes during the day.
⟹ Refer the picture for this flower.
Define the following in one line :
1. Geotropism : Response of a Plant part to gravity stimulus. Eg : Root of a Plant
2. Hydrotropism : Response of a Plant part to water stimulus. Eg : Root of a Plant
3. Thigmotropism : Response of a Plant part to touch stimulus. Eg : Touch me not plant.
4. Chemotropism : Response of a Plant part to chemical stimulus. Eg : Growth of pollen tube in response to sugar present on the stigma.
⟹ Refer the pictures too !
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Answer:
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Explanation:
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