What is emasculation, and when is it necessary in plant breeding?
Sexual Reproduction in Flowering Plants
Original Khojo Papers practice question — not from a past board paper.
Pollen-pistil interaction is the sequence of events from the landing of a pollen grain on the stigma to the entry of the pollen tube into the ovule. It lets the pistil recognise compatible pollen and allow it to germinate, and reject incompatible pollen by preventing germination or the growth of the tube.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
It is the plant's way of ensuring that only the right pollen fertilises the ovule.
From the same topic and chapter, at a similar level.
What is emasculation, and when is it necessary in plant breeding?
Sexual Reproduction in Flowering Plants
Define apomixis and parthenocarpy, and state the practical use of each.
Sexual Reproduction in Flowering Plants
What is double fertilisation, and what does each fusion produce?
Sexual Reproduction in Flowering Plants
Describe the structure of a mature embryo sac and name the cells it contains.
Sexual Reproduction in Flowering Plants
Describe the structure and functions of the placenta.
Human Reproduction
Name the hormones that control the menstrual cycle and state the function of each.
Human Reproduction