A cross section is taken from a dorsal root ganglion. Upon observation, it is noted that the section is full of cell bodies. These cell bodies belong to what order of neuron? a. first
b. second
c. third
d. It could be any of these options.

Option a

Explanation:

The first order neurons are also termed sensory neurons. The dorsal root ganglion is made up of cell bodies of sensory neurons which possess axon that help in the relay of information to the central nervous system mainly the spinal cord.

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