Given below are the life span of the organisms. Find the correct option :
$(1)$ Fruitfly $-\,1$ week
$(2)$ Dog $20-30$ year
$(3)$ Butterfly $1-2$ months
$(4)$ Cat - $1$ year
Gemmule formation in sponges is helpful in
Binary fission is found in
The reason of formation of embryoid from pollen grain in a tissue culture medium is
One of the plants using 'Foliar adventitious buds' as method for vegetative propagation is