Question

nisha cleaned the walls of her terrace which had algae all over it . after a couple of days she found algae growing again . how did this happen ​

Answer 1

Algae reproduces by spore formation or cell division. While cleaning the wall, some spores may have been left on the wall and have multiplied to form new algae structures, hence algae was found again after a few days.

hope it's helpful :)

Answer 2

Algae reproduces by spore formation or cell division. While cleaning the wall, some spores may have been left on the wall and have multiplied to form new algae structures, hence algae was found again after a few days.