Biology kingdom question?

Question

Suppose you are looking at a sample of pond water, and you see a single-celled organism swimming in the water. It's green, and moves quickly. There's a clear picture of a nucleus, but you can't see any other organelles with your compound light microscope. In what kingdom does this organism belong? What other characteristics do you expect this organism to have?

Answer 1

Most probably it would be Euglena. The Euglenoids or Euglenophyta exhibit both plant like feature and animal like features. They can be spotted in pond waters. When you see it green, it is understandbly due to its large single chloroplast. When you see it swimming, it is due to its long flagellum. Its other prominant feature is presence of a reservoir at its anterior end with mouth like organ(cytophage) and an eye spot(stigma). These are its animal like features. It is a controversial organism. Zoologist consider it as a protozoan while as botanists consider it as an alga. However, in present system of 5-kingdom classification it has been included in Kingdom Protista, the kingdom of unicellular eukaryotic organisms.

Answer 2

Kingdom Protista: One celled, eukariotic (with nucleous and organelles).
They can be either free living or parasitic, heterotrophs or Photosinthetic, singled-celled or colonial (like algae)(colonial is not the same as pluricelular, because in colonial organisms each cell is independant and can give rise to another colony).
Bacteria (Kingdom Monera) are prokariotic (and you probably wouldn't see them with a light microscope)
Most organelles are too litle to spot under a light microscope without a dye.

Answer 3

I think it is some type of bacteria from what you've stated. I can't really figure it out without more information. Sorry :(

I hope I was helpful. Good luck!

Answer 4

algae(chlorophyllus) or some blue-green bacteria
seperate it and go for pure culture u can say it confidentally