Question

Ecological amplitude of a species is related to
(a) Zones of stress
(b) Zone of optimum tolerance range of a factor
(c) Area with zones of optimum tolerance ranges of all determining factors
(d) None of the above

Answer 1

Hint: It is the degree of adaptation of living organisms to changes in its environment. It's the limits of environmental conditions within which an organism can live and function.

Complete answer:
Ecological amplitude is the degree of adaptation of living organisms to changes in its environment. Ecological amplitude of a species is said to be the area with zones of optimum tolerance ranges of all determining factors. A species trait, it's expressed quantitatively because the range of environmental changes within which a given species is in a position to hold on its normal vital activities.
Ecological amplitudes are often examined as either the reaction of a species to individual environmental factors or to an aggregate of things. In the first case, species that are ready to tolerate a large range of changes within the strength of an acting factor are designated by a term consisting of the name of the given factor and therefore the prefix “eury,” like eurythermal (referring to the consequences of temperature) , euryhaline (salinity) , and eurybathic (depth) . Species that are adapted to only a narrow range of changes during a given factor are designated by an equivalent term with the prefix “steno,” for instance, stenothermal and stenohaline. Species that exhibit broad ecological amplitude with reference to an aggregate of things are called eurybiades, while species with low adaptability are called stenobionts.
So, the correct answer is ‘Area with zones of optimum tolerance ranges of all determining factors’.

Note: Organisms (including humans) and resources compose ecosystems which, in turn, maintain biophysical feedback mechanisms that moderate processes working on living (biotic) and non-living (abiotic) components of the earth.