How 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.
What are the modifications that are observed in birds that help them fly?
Ravi’s younger brother of class III stated that bats are like birds as they are able to fly.
How will you contradict him and make him understand that bats are mammals and not birds?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
If you are given a specimen, what are the steps that you would follow to classify it?
