CBSE Questions for Class 11 Medical Biology The Living World Quiz 9 - MCQExams.com

• The 7 obligate taxonomic hierarchy used by Carolus Linnaeus in the descending order is Kingdom → Phylum → Class → Order → Family → Genus → Species.
• Since variety doesn't fall in the above category, it is a non-obligate component.

• Phylum, Class, and Genus are various taxonomical categories that only have a theoretical existence for the sake of convenience while species have a real existence which is defined as a group of interbreeding population. 
  
• Example: Cats represent a species having real existence which belong to the genus Felis and family Felidae which do not an organism in living world.

• Largest herbarium of the world is situated in Royal Botanical Garden. It's a  326-acre site at Kew with 40 historically important buildings; it became a UNESCO World Heritage Site on 3 July 2003.
• The collections at Kew and Wakehurst Place include over 28,000 taxa of living plants, 8.3 million plant and fungal herbarium specimens, and 30,000 species in the seed bank.
  

• The correct taxonomic hierarchy in the correct order is given by
  

Correct option: A

Explanation:

• 'Species' is less general in following to genus. 
• Species are the smallest group among all the eight levels of taxonomy with almost similar characters.
• It is followed by Genus with slightly fewer similarities among its members.
• Examples: Armadillo – Dasypus novemcinctus, Cat – Felis catus, etc.

Hence, ‘species’ is the correct answer.

• A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described.
• An isotype is a duplicate of the holotype and is often made for plants, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering.
  
• Hence Two similar holotypes are called isotypes
• So, the correct answer is option D.

• Scientific names of plant family have - 'eae/aceae'. Examples of plant families are Solanaceae and Liliaceae.
  
• Names of order end in - 'ales' and animal subphylum names end in - 'ata'.
  
• Class names in plants end in - 'sida'.
  

• Cohort ranks higher than genus, order, and family in the hierarchy.
  
• Hence it contains the highest number of species since it includes species of different orders, families, and genera.
  

• As we move from higher to lower level of hierarchical classification, common characters increases. 
  
• Among the given options, the order of their hierarchical classification is  - division, order, family, and genus.
  
• At the lowest level of the hierarchy the tomato and potato both belong to the family 'Solanaceae' so they will have the most common features at the level of the family.
  
• So, the correct option is 'Family'.
  

• Anacardiaceae belongs to order Sapindales.
  
• 'Solanaceae' belongs to order 'Polemoniales' and 'Convolvulaceae' belongs to order 'Solanales'. 'Poaceae' is another family belonging to order 'Poales'.

• Museum has collections of preserved plant and animal specimens for study and reference. Specimens are preserved in the containers or jars in preservative solutions. Plant and animal specimens may also be preserved as dry specimens. 
  
• So, the correct option is 'A museum has collection of photographs of plants for reference'.
  

• 'Lamiaceae' is the name of the family of tulsi.
  
• Tulsi belongs to order 'Lamiales' along with plants like mint and lavender.
• 'Poales' is order if flowering plants in the monocots. It includes plants like bamboo, grasses, and wheat.
• Sapindales includes members like mango, citrus, maples, and lychee.