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Diversity In Living Organisms
List the features of Phylum Arthropoda of the Animal kingdom.
Phylum Arthropoda (animals with jointed feet/appandages) -This is the largest group of animals.
Main Features:
(i) They possess jointed legs/appendages.
(ii) They have chitinous exoskeleton.
(iii) The body is segmented and may divisible into two regions—Cephalothorax (head and thorax joined) and Abdomen or into three regions—Head, Thorax and Abdomen.
(iv) Body cavity is reduced and is known as Haemocoel (cavity filled with blood).
(v) These animals are bilaterally symmetrical.
(vi) There is an open circulatory system i.e., the blood does not flow in definite blood vessels.
Examples. Apis (honey bee), Musca, Anopheles (mosquito), Palaemon (Prawn), Crabs etc.
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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.
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.
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