Extinction Of Bio-Diversity
Extinction Of Bio-Diversity
Extinction:
In biology and ecology, extinction refers to the permanent end of an organism or of a group of organisms, normally a species. It is generally considered as the death of the last individual of the group (although the capacity to breed and recover may have been lost before this point). Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.
During evolution, new species arise through the process of speciation - where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche-and species become extinct when they are no longer able to survive in changing conditions or against superior competition. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive virtually unchanged for hundreds of millions of years. Most extinction occurs naturally, without human intervention; it is estimated that 99.9% of all species that have ever existed are now extinct.
Which of the following are human benefits of biodiversity ? | |||
| Right Option : D | |||
| View Explanation | |||
Midlands of Tasmania is a biodiversity hotspot in which country ? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following factors help in the stability of an ecosystem ? | |||
| Right Option : C | |||
| View Explanation | |||
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