You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile, using many short extensions of the cytoplasm, each featuring the ring of 9 2 microtubule filament pattern. It has well-developed organelles and two nuclei, one large and one small. This organism is most likely to be a .A) radiolarians B) slime molds C) ciliates D) kinetoplastids E) foraminiferans

This organism is most likely to be a ciliates.

Explanation:

Ciliates are small unicellular protozoans that contain hair like ciliated projection, called cilia.

They contain 2 different types of nucleus, one is called diploid micro nuclei, that are responsible for carrying germ line of a cell and another one is poliploid macro nuclei that helps to control cell regulation and expression of phenotype of the organism.

Clilates are motile and contain one or more prominent contractile vacuole where they store the food.

The axoneme contain 9 ring like outer doublets and 2 centrally located singlet microtubules, (9+2 axoneme)

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c