A doctor is performing a study under a very powerful microscope and records the following observations: Type of diet
None observed
Measure of growth
No change in size or mass
Amount of waste produced
0 micrograms
Type of reproduction
None observed
Which of the following is the doctor most likely observing?
A a fungus
B a virus
С a protist
Da bacterium

B.) a virus

Explanation:

I believe it's a virus because they typically cannot reproduce without a host, unlike bacterium, fungi, and protists, which can all reproduce asexually.

Biology is not my strong point, but after doing a bit of research, a virus should be the correct answer.

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