Test: Biodiversity And Its Classification - Class 9 MCQ

Division of number of kingdoms in the five kingdom system does not contain - number of mitochondria.
Because mode of nutrition, body organisation and cell structure have been included in the five kingdom system which consists of - MONERA , PROTISTA , FUNGI , PLANTAE , ANIMALIA.

In biological classification, class is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order.

Woese modified the five kingdom system of classification by dividing Kingdom Monera into Archaebacteria and Eubacteria.

The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. 

The system of grouping of living forms on the basis of similarities and differences is called classification.

The branch of biology concerned with classification is called taxonomy. Taxonomy is a biological science which deals with identification, nomenclature and classification of organisms following certain rules.

A species is a group of individual organisms that interbreed and produce fertile, viable offspring. According to this definition, one species is distinguished from another when, in nature, it is not possible for matings between individuals from each species to produce fertile offspring.

The warm and humid tropical regions of earth lying between the Tropic of Cancer and Tropic of Capricorn are having a lot of diversity of organisms. These areas are known as Mega diversity centres aur megadiversity areas.

The 12 Megadiversity centres :

• Brazil
• Colombia
• Ecuador
• Peru
• Mexico
• Zaire
• Madagascar
• Australia
• China
• Indonesia
• Malaysia
• India .

The two kingdom classification system was given by Carlous Linaaeus in 1758. Carlous Linnaeus classified living things into two kingdoms Animal Kingdom which he called as Regnum Animale for animals and for plants he gave the Vegetable Kingdom which he called as Regnum Vegetabile; now known as the Plant Kingdom. He then divided each kingdom into classes and later grouped the classes into phyla for animals and divisions for plants.

Biodiversity is the number of variety of organism found within a specified geographic region. 

Using membranes, the concentrations of ions, small molecules and enzymes may be very different from the cytosol, and they may change according to needs. The potential difference that results from this can be used to create or store energy. And the membrane can be used in the apparatus that creates energy. There may also be a benefit in the storage of the DNA that is used to create enzymes, although in most cases the more secure storage of DNA in the nucleus is a better solution. As the organelles with two membranes (hydrogenosomes, mitosomes, mitochondria and chloroplasts) can reproduce autonomously, their need can easily and quickly be fulfilled.