An ecological niche can be define as the functional role played by the organism in an ecosystem so as to lead it's life cycle, grow, survive and reproduce. Like the resources used by the organism like food source, water source, habitat, type of mating season chosen and others.
In accordance to the competition exclusion principle, when two species or organisms having the same ecological niche, thriving for the same kind of resource, and lives in a same region or ecosystem, then the one which is more superior over the other derives the resource. The other one is excluded from the region by either decline in population, extinction or migration.
A mountain range is larger, and may have lots of peaks not joined as in a ridge. A mountain range refers to an area that contains several geographically similar mountains.
A comparison of the three different forms of double-stranded DNA reveals that <u>Z-DNA</u> has the largest pitch per turn of the helix, whereas <u>A-DNA</u> has the widest diameter.
