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Sporopollenin is present in:...

Sporopollenin is present in:

A

Exine

B

Intine

C

Both (a) and (b)

D

None of these

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Pollen Grains**: Pollen grains are the male gametes in flowering plants. They have a specific structure that consists of two layers. 2. **Identifying the Layers**: The outer layer of the pollen grain is called the Exine, while the inner layer is known as the Entine. 3. **Composition of Exine**: The Exine is characterized by its hardness and is primarily composed of a substance called Sporopollenin. This substance is known for its durability and resistance to various environmental factors, including high temperatures and strong acids. 4. **Composition of Entine**: The Entine, on the other hand, is made up of pectose and cellulose, which are softer and less resistant compared to Sporopollenin. 5. **Germ Pores**: Within the Exine, there are structures called germ pores where Sporopollenin is absent. These pores allow for the germination of the pollen grain. 6. **Conclusion**: Since Sporopollenin is specifically found in the Exine layer of the pollen grain, the correct answer to the question "Sporopollenin is present in:" is **Exine**. **Final Answer**: Exine ---
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Consider the following statements with respect to pollen grains (a) Exine is thin, continuous layer made up of cellulose and pectin (b) Hard outer layer called exine is made of sporopollenin (c) Sporopollenin is present in germ pores (d) Exine exhibits a fascinating array of patterns and designs. Of the above statements

Sporopollenin is part of

Where is sporopollenin present in plants? State its significance with reference to its chemical nature.

Sporopollenin is found in :-

Sporopollenin is found in:

In pollen grains where sporopollenin is absent called germ pore.

Sporopollenin occurs in

Sporopollenin is chemically:

Sporopollenin is formed by polymerisationn of