Question

When vegetative cells of egg form embryo, it is called

• A. Diploid polyembryony
• B. Apospory
  
• C. Apomixis
• D. Adventive polyembrony

Answer 1

The correct option is D Adventive polyembrony

When vegetative cells of egg form embryo, it is called adventive polyembryony. Formation of embryo directly from the diploid sporophytic cells (nucellus or integument i.e vegetative cells) of ovule is called adventive embryony. Such embryos are formed without involving meiosis and sexual fusion, e.g., Citrus, Opuntia, etc. In Citrus, a seed may possess up to 40 embryos.

So, the correct answer is 'Adventive polyembryony'.