Which one of the following characteristics of birds indicates the reptilian ancestry?

Question

Verified by Toppr

Answer 1

Birds and reptiles have many similarities. The reproductive similarity includes the oviparity, in which the egg is laid by the organism for the external development of the young ones. Both the birds and reptiles make eggs coated with calcium shells. This is done to prevent the entry of water into the egg. In order to make the calcareous eggs, both the birds and reptiles show internal fertilization. Since, calcareous eggs appeared first in reptiles, birds are often assumed to have reptilian ancestry.
Hence, the correct answer is 'Eggs with a calcareous shell'.

Answer 2

Birds and reptiles have many similarities. The reproductive similarity includes the oviparity, in which the egg is laid by the organism for the external development of the young ones. Both the birds and reptiles make eggs coated with calcium shells. This is done to prevent the entry of water into the egg. In order to make the calcareous eggs, both the birds and reptiles show internal fertilization. Since, calcareous eggs appeared first in reptiles, birds are often assumed to have reptilian ancestry.

Hence, the correct answer is 'Eggs with a calcareous shell'.

Which one of the following characteristics of birds indicates the reptilian ancestry?

Two special chambers, cro and gizzard in their digestive tract

Eggs with a calcareous shell

Scales on their hind limbs

Four-chambered heart

A trait which is not characteristics of bird is?

Which of the following characteristics is applicable for birds?

Which one of the following is flightless bird?

Which one of the following characteristics is not common between birds and mammals?

Which one of the following is characteristic of birds?

Revise with Concepts

Class Aves

Class Mammalia