Question

Science
Chapter 7 Diversity in living Organisms

1. What are the advantages of classifying organisms?

2. How would you choose between two characteristics to be used for

developing a hierarchy in classification?

3. Explain the basis for grouping organisms into five kingdoms.

4. What are the major divisions in the Plantae? What is the basis for

these divisions?

5. How are the criteria for deciding divisions in plants different from the

criteria for deciding the subgroups among animals?

6. Explain how animals in Vertebrata are classified into further

subgroups.

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Answer 1

Answer:

1.ans :- The advantages of classifying organisms: It makes us aware of and gives us information regarding the diversity of plants and animals. It makes the study of different kinds of organisms much easier. It tells us about the inter-relationship among the various organisms.

2 ans:- How would you choose between two characteristics to be used for developing a hierarchy in classification? Ans. Gross character will form the basis of start of the hierarchy and fine character will form the basis of further steps of single the hierarchy.

3 ans :- The basis of grouping organisms into five kingdoms is as follows: ... Unicellular eukaryotes form the kingdom Protista, and multicellular eukaryotes form the kingdom of Fungi, Plantae, and Animalia. - Cell Structure : There are two broad categories on the basis of cell structure: eukaryotes and prokaryotes

4 ans:- Thallophyta – Simple body design; with no differentiation into root, stem and leaves.

Bryophyta – Body is differentiated into stem and leaf-like structures. ...

Pteridophyta – Body is differentiated into root, stem and leaves.

5 ans:- The criteria for deciding divisions in plants are the presence or absence of seeds and flowers, differentiation of body parts, presence or absence of specialized vascular tissues and nature of the seed.

6 ans:- Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals.

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