Question

What happens when (a) Planaria gets cut into two pieces ? (b) A mature spirogyra filament attains considerable length ? (c) On maturation sporangia burst ?

Answer 1

answers are
a regeneration
b fragmentation
c spore formation

Answer 2

a) it regenerate and form two new planaria's.

b)in this case fragmentation takes place. As soon as spirogyra reaches it's maturity it's body breaks down into two or more pieces and these subsequently form a new organism.