In asexual reproduction, a. the offspring are genetically unique b. the offspring are made up of portions of each of the parent's dna c. the offspring are genetically related but also genetically distinct d. the offspring have identical dna

In asexual reproduction, d. the offspring have identical DNA.

Asexual reproduction involves the process of mitosis for cell division. In the process of mitosis, the DNA duplicates and separates into two different cells. The duplicated DNA is genetically identical to the DNA of the mother or parent cell. This type of reproduction is faster than the reproductive method.

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