Relate the importance of Biodiversity with natural ecosystems through examples?
Biodiversity:
Biodiversity is a measure of the variety of organisms present in different ecosystems.
The term “biodiversity” has been derived from 'bio' and ‘diversity’. Formerly it was called “natural diversity”. “Diversity” means variety within a species and among species.
Importance of biodiversity and natural ecosystem:
Plants and animals (flora and fauna) diversity depends on the climate, altitude, soil, and the presence of other species. Biodiversity is not distributed evenly on Earth. It is richer in the tropics while there are fewer species in the polar regions. In the year 2006 large number of the Earth's species were classified as endangered or threatened species.
Examples:
Explain the aims and principles of classification, keeping in view its historical background?
Classification:
Biological classification is a method by which biologists group and categorize species of organisms.
Aims of Classification:
Taxonomy:
The branch of biology that deals with classification are called taxonomy.
Systematic:
The branch which deals with classification and also traces the evolutionary history of organisms is known as systematics. The main aims of both these branches are:
Principles of Classification/Basis of Classification:
Explain the base for establishing five kingdoms of living organisms?
In 1967, Robert Whittaker introduced the five-kingdom classification system. This system is based on: