Chapter 7
Diversity in Living Organisms
Page-80
Questions-
1. Why do we classify organisms?
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2. Give three examples of the range of variations that you see in lifeforms around you.
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Page-82
Questions-
1. 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?
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2. What is the primary characteristic on which the broad division of organisms is made?
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3. On what bases are plants and animals put into different categories?
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Page-83
Questions-
1. Which organisms are called primitive and how are they different from the so-called advanced organisms?
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2. Will advanced organisms be the same as complex organisms? Why?
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Page-85
Questions-
1. What is the criterion for classification of organisms as belonging to kingdom Monera or Protita?
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2. In which kingdom will you place an organism which is single celled, eukaryotic and photosynthetic?
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3. In the hierarchy of classification, which grouping will have the smallest number of organisms with maximum common characteristics and which will have the largest number of organisms?
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Page-88
Questions-
1. Which division among plants has the simplest organisms?
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2. How are pteridophytes different from the phanerogams?
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3. How do gymnosperms and angiosperms differ from each other?
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Page-94
Questions-
1. How do poriferan animals differ from coelenterate animals?
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2. How do annelid animals differ from arthropods?
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3. What are the differences between amphibians and reptiles?
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4. What are the differences between animals belonging to the aves group and those in the mammalia group?
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Exercises-
1. What are the advantages of classifying organisms?
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2. How would you choose between two characteristics to be used for developing a hierarchy in classification?
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3. Explain the basis for grouping organisms into five kingdoms.
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4. What are the major divisions in the plantae? What is the basis for these divisions?
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5. How are the criteria for deciding divisions in plants different form the criteria for deciding the subgroups among animals?
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6. Explain how animals in Vertebrata are classified into further subgroups.
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