Give economic importance of phylum potozoa and phylum chrysophyta...

Economic importance of Protozoa are as follows -

1. They are the ultimate decomposers in nature, as they feed on bacteria and fungi, which decompose dead organic matter.
2. They are useful in the treatment of sewage.
3. Some protozoans live in the body of other organisms and help them.

Economic importance of Chrysophyta members are-

1. Source of food for many fish 
2. Useful in filtration process
3. Useful is several industries.

Regards

 

Regards