Question

In any given ecosystem, the number of individuals in a species remains more or less constant over a period of time. This constancy of number is maintained by
(a) Parasites
(b) Predators
(c) Man
(d) Available food
(e) All of the above

Answer 1

Hint: It is regularly classified into its abiotic constituents, including minerals, atmosphere, soil, water, daylight, and each other non living component, and its biotic constituents, comprising all its living individuals. The fundamental source of energy in almost all systems is radiant energy from the Sun.

Complete answer:
In a closed ecosystem, the number of biotic components of an ecosystem is maintained constant. The closed ecosystem remains in a static phase. In any closed ecosystem at equilibrium, all the energy of net production must be spent by consumers and decomposers so as for the system to possess a balanced energy budget. Such an idealized system is often thought of as being saturated with individual organisms because all available energy is employed and no more organisms might be supported.
Despite the fact that predators, by decreasing densities of life forms at lower trophic levels, can keep their prey populations from arriving at in any case maximal stable densities and subsequently viably block genuine immersion inside that lower trophic level. If this is often the case, only top predator populations reach complete saturation. Real ecological systems are almost never truly closed; rather, they typically both receive materials and energy from other systems and lose them to others.

Additional Information: -A biological system comprises a network of creatures along with their physical climate.
-Ecosystems are often of various sizes and maybe marine, aquatic, or terrestrial. Broad categories of terrestrial ecosystems are called biomes.
So the right answer to the above question is ‘ All of the above’.

Note: In ecosystems, both matter and energy are conserved. Energy flows through the system—usually from light to heat—while the matter is recycled. Biological systems with higher biodiversity will in general be more steady with more prominent obstruction and strength inside the essence of unsettling influences, troublesome functions.