there are 3,under the kingdom protista. The plantlike,animal like and the fungus like.protist could be also helpful but it can also result to amebic dysentery.it could have lots of uses like use for medicine purposes like a green algae.

Answers

2014-02-16T13:11:56+08:00
Protists are important manufacturers of oxygen in the marine environment.

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2014-02-16T16:20:44+08:00
Most of the uses of protists you will find have to do with the algae. 

Algae are used for in the environment for: 
1. food at the beginning of aquatic food chains 
2. camouflage on some organisms 
3. habitat for sea urchins, sea otters, ... 
4. producing oxygen during photosynthesis 

Algae are used by people for: 
1. food 
2. fertilizer on gardens 
3. agar for bacterial cultures 
4. extracts for making cosmetics, pudding, ice cream, etc. smoother and creamier 
5. abrasive substances in polishes and toothpastes 
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