Nitsch was able to get strawbarries of curious shapes by
Removing all the perianth
Splitting the ovary
Selectively removing some carpels
Inserting a needle into the ovary
Double fertilization was first discovered by Nawaschin $(1898)$ in
Pollination by snail and slug is called
In Maize, the flowers are
Which one of the following character causes cross pollination
Double fertilisation is exhibited by