Give 2 differences between perisperm and endosperm with examples.

How it is possible in oxalis and viola plants to produce assured seed sets even in the absence of pollinators?

what are synergids and antipodal cells how are connected to each other?

wht is microspore tetrad ?

what is difference between microspore and pollen grain?

Explain the terms "tenuinucellate" and "crassinucellate" ?

What is the significance of double fertilisation?

May u plz tell...What are the examples of Geitonogamy and Xenogamy...???

 what is the difference between microsporangia, microsporangium & megasporangia, megasporangium?

labelled diagram of microsporogenesis n macrosporogenesis.