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Diversity In Living Organisms
What are algae? Give example.
Algae or thallophyta are a classification of the plant kingdom. Algae have the following characteristics:
(i) Plants which have thaloid body i.e., body is not differentiated into root, stem and leaf.
(ii) Plant cells contain pigment like chlorophyll and other pigment and are autotrophic.
(iii) They are prdominantly aquatic.
Example. Spirogyra, Ulothrix, Cladophora, Ulva and Chara.
Thallophyta-Algae.
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Why do we classify organisms?
Give three examples of the range of variations that you see in life form around you.
What was the basis of animal classification done by Aristotle.
Why a method of classification of animals proposed by Aristotle was not accepted ? Explain with example.
What do you mean by ‘characteristics’? Explain with example.
How hierarchy of classification be built?
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 organism is made?
On what basis are plants and animals put into different categories?
What indicates that the classification of life forms will be closely related to their evolution?
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