Short Answer TypeWhat are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account?
Long Answer TypeHow useful is the study of the nature of body cavity and coelom in the classification of animals?
Coelom is the body cavity which is lined by a mesoderm. The presence or absence of body cavity or coelom plays a very important role in the classification of animals.
Animals that having a cavity between body wall and digestive tract are known as coelomates for eg. annelids, molluscs, arthropods, echinodermates, and chordates etc.
The animals in which the body cavity is not lined by mesoderm are known as pseudocoelomates. In such animals, mesoderm is scattered in between ectoderm and endoderm. Aschelminthes is an example of pseudocoelomates.
Animals in which the body cavity is absent are known as acoelomates For e.g platyhelminthes.
Short Answer TypeWhat are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Multiple Choice QuestionsWater vascular system is the characteristic of which group of the following:
Porifera
Ctenophora
Echinodermata
Chordata
Short Answer Type“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
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