Assertion: Sporopollenin of exine is not degraded by any enzyme. It is not affected by high temperatures, strong acids or strong alkali.
Reason: Sporopollenin is resistant to chemical and biological decomposition.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

The correct answer is Option (1) -Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

Assertion (A): Sporopollenin of exine is not degraded by any enzyme. It is not affected by high temperatures, strong acids, or strong alkali.

Correct: Sporopollenin, which makes up the exine layer of pollen grains, is known for its extraordinary resistance to enzymatic degradation and extreme environmental conditions. Sporopollenin is not easily degraded by enzymes, making it resistant to enzymatic degradation. It is also highly resistant to extreme conditions such as high temperatures, strong acids, and strong alkalis.

Reason (R): Sporopollenin is resistant to chemical and biological decomposition.

Correct: The reasoning correctly identifies why sporopollenin is so resistant; its chemical structure makes it highly resistant to both chemical and biological degradation. This resilience allows pollen grains to withstand harsh environmental conditions and ensures the protection of the genetic material contained within the pollen grain.

Sporopollenin of the exine is not degraded by enzymes and remains unaffected by high temperature, strong acids, and strong alkalis due to its resistance to chemical and biological decomposition.

So, both statements are correct and the reason provided accurately explains the assertion.