Algae are known to reproduce asexually by variety of spores under different environmental conditions. Name these spores and the conditions under which they are produced. 

Explanation

Algae reproduce asexually by variety or spores under different environmental conditions.
These spores and the conditions under which they are produced are as follow :
  (a) Zoospores : These are thin walled, flagellated motile spores as they are equipped with flagella.
.Conditions under which it is produced : These are formed under favourable conditions and spread by wind.

Aplanospores : These are thin walled nonmotile spores and lack flagella.
Conditions under which it is produced : These are formed under unfavourable conditions.

Hypnospore : These sporas have thick cell wall to tide over unfavourable conditions.
Conditions under which it is produced : These are formed under unfavourable conditions.
(d) Akinetes : These are formed from vegetative cells and serve as resting cells.
Conditions under which it is produced : Formed under unfavourable conditions.
(e) Statospore : These are similar to akinetes and are found in diatoms.
Conditions under which it is produced : Formed under unfavourable conditions.