Question

nisha cleaned the wall of her terrace whaich had algea all over it. After a couple of days she found algae growing again. how did this happen,?

Answer 1

algae needs moisture and a temprature which is appropretate for its growing hence its a regenrative organism it can spread over and and can generate itself so the roof which was cleaned would have some of them left or because of the moisture or temp.it would have regentrate there again