Diversity in Living Organisms – Science – (NCERT Solutions for Class 9)
- Why do we classify organisms?
- Give three examples of the range of variations that you see in life-forms around you.
- Which do you think is a more basic characteristic for classifying organisms?
(a) The place where they live.
(b) The kind of cells they are made of. Why?
- What is the primary characteristic on which the first division of organisms is made?
- On what basis are plants and animals put into different categories?
- Which organisms are called primitive and how are they different from the so-called advanced organisms?
- Will advanced organisms be the same as complex organisms? Why?
- What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
- In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic?
- In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?
- Which division among plants has the simplest organisms?
- How are pteridophytes different from the phanerogams?
- How do gymnosperms and angiosperms differ from each other?
- How do poriferan animals differ from coelenterate animals?
- How do annelid animals differ from arthropods?
- What are the differences between amphibians and reptiles?
- What are the advantages of classifying organisms?
- How would you choose between two characteristics to be used for developing a hierarchy in classification?
- Explain the basis for grouping organisms into five kingdoms.
- What are the major divisions in the Plantae? What is the basis for these divisions?
- How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
- Explain how animals in Vertebrata are classified into further subgroups.