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Question
Name the five types of tropisms. How are tropic movements helpful to plants? Explain with an example
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Solution
●The five types of tropism are phototropism, geotropism, chemotropism, hydrotropism, and thigmotropism which responds to the stimulus of light, gravity, chemical, water, and touch respectively.
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The tropic movements of plants are helpful in the following ways:
-Phototropism helps the stem to grow towards sunlight helping the plant to perform photosynthesis.
-Geotropism helps the plant roots to grow deep into the soil thus absorbing water and minerals and fixing the plant properly in the soil.
-Chemotropism helps the pollen tube to grow towards the ovary thus helping in fertilization of gametes for fruit production.
-Hydrotropism helps the plant roots to absorb water and dissolved minerals from the soil.
-Thigmotropism helps the plant to grow firmly along the support for better growth and development.
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The tropic movements of plants are helpful in the following ways:
-Phototropism helps the stem to grow towards sunlight helping the plant to perform photosynthesis.
-Geotropism helps the plant roots to grow deep into the soil thus absorbing water and minerals and fixing the plant properly in the soil.
-Chemotropism helps the pollen tube to grow towards the ovary thus helping in fertilization of gametes for fruit production.
-Hydrotropism helps the plant roots to absorb water and dissolved minerals from the soil.
-Thigmotropism helps the plant to grow firmly along the support for better growth and development.
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