Question

what happens when : (1)planaria gets cut into two pieces ? (2)a mature spirogyra filament attains considerable length? (3)on maturation sporangia brust?

Answer 1

For example when planeria is cut into three piece like the head,tale,and the middle part after it is cut it again develops fron the part which was cut

Answer 2

1. when planaria gets cut into two pieces ( fragmentation happens) its a kind of asexual reproduction for them
2.it breaks of and hence leads to asexual reproduction
3 . the spores comes out and wait till the favourable conditions comes for them