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Diversity In Living Organisms
List the features of Phylum Nematoda fo the Animal Kingdom.
Phylum Nematoda (Aschelminthes) (round or thread worms)
Main Features:
(i) Most of the Aschelminthes are small cylindrical or round worms.
(ii) Body cavity is not a true coelom. A pseudocoelom is present.
(iii) Body is bilaterally symetrical and triploblastic.
(iv) Sexes are separate.
(v) There are tissues but no real organs.
Examples. Ascaris (round worm), Ancylostoma (hook worm) and Wuchereria (filarial worm) causes elephantiasis.
Ascaris
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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.
Name the biggest animal and the tallest tree.
What is classification?
Name the branch of science which deals with classification.
Why do we classify organisms?
Give three examples of the range of variations that you see in life form around you.
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