Question

Select the correct sequence of animals on basis of their complexities.

• A. Pisces, Amphibia, Reptilia, Aves and Mammalia
• B. Pisces, Reptilia, Amphibia, Aves and Mammalia
• C. Amphibia, Pisces, Aves, Mammalia and Reptilia
• D. Reptilia, Pisces, Aves, Amphibia and Mammalia

Answer 1

The correct option is A Pisces, Amphibia, Reptilia, Aves and Mammalia

• Complexity level is associated with evolution. Pisces being the earliest members are least complex and mammals being the last members, which includes humans are most complex animals in the animal kingdom.
• The complexity increases for every system, for example, two-chambered heart to four-chambered heart, increase in size of the brain, development of lungs from gills.
• Hence, the correct answer is option A.