The Living World Test - 20

• Common characters increase as we are move from lower taxonomic rank to the higher one. Each higher rank contains several lower ranks taxa.
• Species is a lower rank than kingdom and genus.
• The order is a lower rank than class.

• Systematics is the science of identifying, naming and classifying the organisms on the basis of the evolutionary relationship.
  
• Anatomy is the science of the internal structure of organisms and morphology is the external appearance of an organism. 
  
• Taxonomy deals only with identifying and naming of the organism.
  

• Eleusine coracana, commonly known as ragi or finger millet is an annual herbaceous plant belonging to family Poaceae.
• It is widely grown as a cereal crop in arid and semi-arid areas in Africa and Asia. 
• It is a short-day plant and native to Ethiopian and Ugandan highlands. It has the ability to withstand cultivation at higher altitudes, high drought tolerance and long storage time of grains.
  
  So, the correct answer is 'Eleusine coracana'.

The 8 levels of modern taxonomy classification system are Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

'Acharya Jagdish Chandra Bose Indian Botanic Garden' was previously known as 'Royal Botanic Garden is situated in Shibpur near Kolkata which exhibits over 12,000 specimens over an area of 109 hectares.

The binomial system of naming a species was first devised by Swedish botanist and physician Carolus Linnaeus.

Crotolaria juncea, commonly known as sunn hemp, Indian hemp is a tropical Asian plant belonging to legume family Fabaceae.. It is generally considered to as originated in Indian. It is now widely grown throughout the tropics and subtropics as a source of green manure, fodder and lignified fibre. It is also used as biofuel. It is an annual plant and it is an important summer cover crop in the United States. Hence, the scientific name of Sunn hemp is Crotalaria juncea. So, the correct answer is 'Crotalaria juncea'.

The taxonomic key is a choice between two contradictory statements resulting in the acceptance of one and the rejection of the other.

• Taxa is a group of many populations of an organism. Out of the given options, dogs, cats, mammals, wheat, rice, plants, mango are taxa at different levels. Wood, leaves and jointed legs are parts of plant and animal body. 
• Hence, they are not considered as taxa. 
  

There is no suffix for genus and species. Family is a taxonomic category between the division and order. It includes one or more genera. Its suffix is 'aceae'. For example, Solanaceae. In case of vascular plants order ends with suffix 'ales'.