What are the modifications that are observed in birds that help them fly?
Birds have undergone many structural adaptations to suit their aerial life. Some of these adaptations are as follows:
(i) Streamlined body for rapid and smooth movement and to counter the resistance offered by the air current.
(ii) Covering of feathers for insulation.
(iii) Forelimbs modified into wings and hind limbs used for walking, perching, and swimming.
(iv) Presence of pneumatic bones to reduce weight.
(v) Presence of additional air sacs to supplement respiration.
(vi) Endoskeleton has hollow long bones to reduce weight that favors flying.
(vii) Uricotelic excretion that helps to reduce storage of water to reduce weight.
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?
How useful is the study of the nature of body cavity and coelom in the classification of animals?
If you are given a specimen, what are the steps that you would follow to classify it?
