Podcast
Questions and Answers
What is the main purpose of the generative cell in a mature pollen grain?
What is the main purpose of the generative cell in a mature pollen grain?
- Initiation of pollen allergy
- Storage of food reserves
- Division to produce male gametes (correct)
- Protection of the vegetative cell
Which component surrounds the cytoplasm of a pollen grain?
Which component surrounds the cytoplasm of a pollen grain?
- Mitochondria
- Nucleus
- Plasma membrane (correct)
- Cell wall made of cellulose
In how many angiosperms does a microspore mature into a 2-celled stage?
In how many angiosperms does a microspore mature into a 2-celled stage?
- 20%
- 50%
- Over 60% (correct)
- Less than 10%
What role does the vegetative cell play in a mature pollen grain?
What role does the vegetative cell play in a mature pollen grain?
Which condition arises due to severe allergies caused by pollen grains in some people?
Which condition arises due to severe allergies caused by pollen grains in some people?
In species where the generative cell divides mitotically, at what stage are the pollen grains shed?
In species where the generative cell divides mitotically, at what stage are the pollen grains shed?
What are the two layers of the pollen grain wall?
What are the two layers of the pollen grain wall?
What is the central tissue in the ovule where the archesporium differentiates?
What is the central tissue in the ovule where the archesporium differentiates?
Which structure in the mature embryo sac contains two synergids and an egg cell?
Which structure in the mature embryo sac contains two synergids and an egg cell?
What is the mechanism to transfer pollen grains from the anther to the stigma called?
What is the mechanism to transfer pollen grains from the anther to the stigma called?
What is the process called when the pollen tube enters the embryo sac and is compatible?
What is the process called when the pollen tube enters the embryo sac and is compatible?
Which male reproductive structure has a generative cell and a vegetative cell?
Which male reproductive structure has a generative cell and a vegetative cell?
Why are pollen grains well-preserved as fossils?
Why are pollen grains well-preserved as fossils?
What is the main function of the exine layer of the pollen grain?
What is the main function of the exine layer of the pollen grain?
Which part of the pollen grain is responsible for its resistance to high temperatures and strong acids?
Which part of the pollen grain is responsible for its resistance to high temperatures and strong acids?
What is the main purpose of the germ pore on a pollen grain?
What is the main purpose of the germ pore on a pollen grain?
What accounts for the variety of architecture seen on pollen grains from different species?
What accounts for the variety of architecture seen on pollen grains from different species?
Which layer of the pollen grain is specifically mentioned to be hard and resistant?
Which layer of the pollen grain is specifically mentioned to be hard and resistant?
