Euglenoids do not cause disease.
euglenoids live in fresh water
No, they are eukaryote.
They are not.
Euglenoids belong to the phylum Euglenozoa.
Yes, plants produce oxygen and need carbon dioxide and sunlight to produce food.
No, they aren't photosynthetic.
in fresh water
yes
They reproduce asexually.
Iron reacts with oxygen to produce rust.
When it is growing, yes. All plants produce oxygen.