Question

Abyssal zone in ocean has
A. No sunlight but contains consumers and decomposers
B. No sunlight but producers
C. No sunlight but living beings
D. Sunlight as well as producers

Answer 1

Hint: Abyssal zone is the deepest layer of an ocean. It is the broadest layer too. It is located way below the surface, sunlight doesn’t reach this part of the ocean. Organisms use special mechanisms to thrive in this layer of oceans.

Step by step answer:Oceans contain a large variety of species diversity. Talking about the layers of an ocean, the deepest layer is called the abyssal zone. Remember that it occupies more than half of the total ocean.

It is the deepest layer of the ocean touching the earth’s surface. The sunlight can’t reach this zone. Thus, no green plants can thrive in this zone as they can’t obtain sunlight essential for photosynthesis. But don’t think that this zone is devoid of life forms. There are several bacterias that don't require sunlight thriving in this zone of the ocean. They are mainly decomposers as they feed on the debris of life forms present in the upper layers of the ocean. Also, some fishes and certain invertebrates can live in this region. They are the consumers. It is important to know that the biomass of the abyssal zone will be more in the deepest part close to the earth’s surface as most decomposers and organic debris are seen in this part than the upper part of the abyssal zone.
Hence the correct option is option A

Note: Besides the deepest part of the ocean, this zone has the least temperature and the highest pressure. As the sunlight doesn’t reach this part, it is very cold and the high pressure is because of the water column above.