Questions and Answers
Which layer of the pollen grain is made up of sporopollenin, a highly resistant organic material?
What is the function of the germ pore in the pollen grain exine?
What is the composition of the inner wall of the pollen grain?
What is the size range of pollen grains?
Signup and view all the answers
Why are pollen grains well-preserved as fossils?
Signup and view all the answers
True or false: Pollen grains are generally spherical in shape?
Signup and view all the answers
True or false: The exine of pollen grains is made up of sporopollenin?
Signup and view all the answers
True or false: Sporopollenin can withstand high temperatures and strong acids and alkali?
Signup and view all the answers
True or false: No enzyme that degrades sporopollenin is known?
Signup and view all the answers
True or false: The inner wall of the pollen grain is called the exine?
Signup and view all the answers
True or false: The exine of pollen grains is made up of sporopollenin?
Signup and view all the answers
True or false: The inner wall of the pollen grain is called the intine?
Signup and view all the answers
True or false: No enzyme that degrades sporopollenin is known?
Signup and view all the answers
True or false: Pollen grains are generally spherical in shape?
Signup and view all the answers
True or false: Sporopollenin can withstand high temperatures and strong acids and alkali?
Signup and view all the answers
Why is the exine of pollen grains hard?
Signup and view all the answers
What is the function of the germ pore in the pollen grain exine?
Signup and view all the answers
What is the composition of the inner wall of the pollen grain?
Signup and view all the answers
What is the size range of pollen grains?
Signup and view all the answers
What is the outer layer of the pollen grain called?
Signup and view all the answers
Study Notes
Pollen Grain Structure
- The outer layer of the pollen grain, called the exine, is made up of sporopollenin, a highly resistant organic material.
Exine Composition
- The exine is composed of sporopollenin, which can withstand high temperatures and strong acids and alkali.
- No enzyme that degrades sporopollenin is known.
Intine Composition
- The inner wall of the pollen grain is called the intine, and its composition is different from the exine.
Pollen Grain Characteristics
- Pollen grains are not generally spherical in shape.
- The size range of pollen grains varies.
- Pollen grains are well-preserved as fossils due to the resistant nature of sporopollenin.
Germ Pore Function
- The germ pore in the pollen grain exine serves a function related to plant reproduction.
Exine Hardness
- The exine of pollen grains is hard due to the presence of sporopollenin.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge about pollen grains and their unique features with this quiz. Learn about the composition of the two-layered wall, the durability of the outer layer, and more.