Answer :

Some of the asexual spores produced by algae are:

• Zoospore: a) structure: thin walled spores, motile flagellated.

a) It is produced under favourable conditions

• Aplanospores: a) Structure: thin walled, non motile spores [lacks flagella].

B) It is produced under unfavourable conditions.

• Hypnospores: a) Structure: these are the thick walled spores.

b) It helps to tide over unfavourable conditions.

• Akinites : a) Structure: these are from the vegetative cells, thick cell wall.

b) formed under unfavourable condition.

• Hormogonia: a) Structure: these are the fragments of filaments formed due to breakage of thallus due to the formation of mucilaginous filled necridia.

b) formed under unfavourable condition.

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