Answer the following questions:

a) Cite any three examples of algal-symbiotic association.

b) Mention any six uses of algae for human welfare, giving one example of each.

a). Lichens are an example of a symbiotic relationship between algae and certain fungi. They are capable of producing their own food. The alga that is associated with fungus is a green or blue- green alga. There are three forms of lichens based on growth patterns. 

b).Six uses of algae for human welfare are -

1. Food for sea animals and fishes:

The algae are used as a direct source of food by several sea animals and fishes.

The marine algae are rich in iodine and several other important minerals. This makes the fundamental ___ __________ ____ ________ ____ __________ _________.
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