Q181 / 200 · NEET 2008 (Screening) · Zoology

Which one of the following in birds, indicates their reptilian ancestry?

Correct answer
A
Scales on their hind limbs
B
Four chambered heart
C
Two special chambers crop and gizzard in their digestive tract
D
Eggs with a calcareous shell

Solution

The dry skin of reptiles is covered with scales to prevent water loss as an adaptation to terrestrial life. The hind limbs of birds also have scales, which confirm their reptilian ancestry.

Hence, the correct answer is option: 'A'.

Relevant Questions

Industrial melanism is an example of:2015 (Phase 2)Process or Mechanism of Evolution
Which one of the following options gives one correct example each of convergent evolution and divergent evolution?2012 (Screening)Process or Mechanism of Evolution
Thorn of Bougainvillea and tendril of Cucurbita are examples of2008 (Screening)Process or Mechanism of Evolution
Age of fossils in the post was generally determined by radio-carbon method and other methods involve radioactive elements found the rocks. M2004Process or Mechanism of Evolution
Convergent evolution is illustrated by:2003Process or Mechanism of Evolution
Which of the following are homologous organs?2002Process or Mechanism of Evolution