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प्रश्न
Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B.
उत्तर
- A - Chalazogamy
- B - Mesogamy
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संबंधित प्रश्न
Very short answer type question:
Name the part of gynoecium that determines the compatible nature of pollen grain.
Incompatibility is a natural barrier in the fusion of gametes. How will you explain this statement?
Give an account of pollen pistil interaction in detail.
Identify the process represented in the following diagram.
Which of the following induces pollen germination and tube growth in vitro?
After a successful germination, the tip of the pollen tube enters in one of the______ and then ruptures to release the contents.
Identify the INCORRECT statement from the following.
i. The compatible pollen absorbs water and nutrients from the surface of stigma, germinates and produces pollen tube.
ii. The pistil has the ability to recognise and accept the right or compatible pollen of the same species.
iii. Pollination always guarantee the transfer of right type of pollen grain on stigma.
Fill up the blanks with suitable words and select the correct option.
The ability of the pistil to recognize pollen is dependent on ____________ components and ____________ guide the entry of pollen tube. This study leads to help ____________ in getting ____________ even in ____________.
p. Chemical
q. Plant breeders
r. Hybrids
s. Incompatible pollination
t. Synergids
In angiosperms, pollen tube liberates their, male gametes into the ______.
