MCQ
What is the function of germ pore?
- AEmergence of radicle
- BAbsorption of water for seed germination
- ✓Initiation of pollen tube
- DRelease of male gametes
✓
Answer
Correct option: C.
Initiation of pollen tube
c
(c) : In a pollen grain, exine is thin or absent at certain places. These areas may have thickened intine or deposition of callose. They are called germ pores (if rounded) or germinal furrows (if elongated). After pollination, the pollen grain on the stigma absorbs water and nutrients from the stigmatic secretion through its germ pores. The tube or vegetative cell enlarges and comes out of pollen grains through germ pore to form a pollen tube.
(c) : In a pollen grain, exine is thin or absent at certain places. These areas may have thickened intine or deposition of callose. They are called germ pores (if rounded) or germinal furrows (if elongated). After pollination, the pollen grain on the stigma absorbs water and nutrients from the stigmatic secretion through its germ pores. The tube or vegetative cell enlarges and comes out of pollen grains through germ pore to form a pollen tube.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In Gel Electrophoresis, fragments are moved from:
1. Anode to Cathode
2. Cathode to Anode
3. Negative to Positive
4. Positive to Negative
1. Anode to Cathode
2. Cathode to Anode
3. Negative to Positive
4. Positive to Negative
The correct order of milk secretion from the mammary gland is:
Nepenthes khasiana is:
In $\text{DNA}$ replication, the primer is:
→$A$ - A crop expressing a cry gene is usually resistant to a group of insects.
→$R$ - Cry proteins produced from Bacillusthuringiensis is toxic to larvae of Certain insects.
Ancestors of mammals belongs to
Restoration of ecological equilibrium in mined areas can be achieved throug:
The most important example of point mutation is found in a disease called
Presence of large amount of nutrients in water also cause excess growth of planktonic $($free$-$floating$)$ algae, called $.........$
→Cheese is prepared from