Olympiad Test: Diversity in Living Organisms- 1 - Class 9 MCQ

Complexity of cell structures

Complexity of body structures

Mode of obtaining nutrition

Ecological lifestyle

Phylogenetic relationship

The five kingdoms proposed by him were:

Kingdom Monera which includes prokaryotes.

Kingdom Protista which includes unicellular eukaryotes.

Kingdom Fungi which includes fungi.

Kingdom Plantae which includes multicellular eukaryotic plants.

Kingdom Animalia which includes multicellular animals.

Initially, 25 biodiversity hotspots were identified but subsequently, nine more have been added to the list, bringing the total number of biodiversity hotspots in the world to 34. These hotspots are also regions of accelerated habitat loss. Three of these hotspots are - western ghats and Sri Lanka, Indo-Burma and Himalayas cover our country's exceptionally high biodiversity regions. Although all the biodiversity hotspots put together cover less than 2 percent of the Earth's land area, the number of species they collectively harbour is extremely high and strict protection of these hotspots could reduce the ongoing mass extinctions by almost 30%.

The taxon is the term for any taxonomic category. It is used to denote any taxonomic unit. Taxon can be simply defined as the group of organisms occupying a particular category/rank. For example aves, mammalia are examples of taxon and 'class' is their taxonomic rank. Similarly, primate is an example of another taxon and 'order' denotes it's taxonomic rank.