Question

What are the two main processes that ecosystems depend upon?

Answer 1

Answer:

The correct answer is- B) nutrient recycling and energy flow

Explanation:

The two processes on which an ecosystem depends upon is the recycling of the chemical nutrients and the flow of energy through all life forms. The two-process in interconnected with each other.

The energy enters the ecosystem in the form of light energy. This light energy is used by plants and algae to make food in the form of chemical like glucose. Then this energy passes to herbivores, from herbivore energy transfers to carnivores. So this transfer of energy is important for making a stable ecosystem.

Degradation of dead animals and plant organic matter in the soil replenish the nutrients which was present in organic matter and are again used by living organism. So the correct answer is B.

Answer 2

Answer:

Option (B)

Explanation:

Ecosystem is usually defined as a biological community or a group of living species that exist in an environment and interacts with it, for their growth and expansion. The type of ecosystem is controlled by factors such a rainfall, temperature, elevation, and many more.

The two main processes on which an ecosystem depends are the nutrient recycle and flow of energy. The ecosystem obtains various nutrients such as carbon, iron, phosphorous, sodium, potassium, sulfur and many more, from the organisms and plants. The micro-organisms or decomposers are also responsible for providing the nutrients to the soil, which are then taken up by the plants and are again transferred to the consumers when they obtain those plants. These nutrients are continuously transferred and recycled from one level to another.

Similarly, the energy also is transferred from one form to another. About 10% of the energy is transported from one trophic level to the next higher trophic level, and the remaining energy is released into the environment or atmosphere.

This is how both these processes occur simultaneously and keeps on recycling and reusing.

Thus, the correct answer is option (B).