Question

which of the following is a major similarity observed in the embryological development of vertebrates? 1. development of paired pharyngeal arches. 2. growth of external features like feathers or hair. 3. development of the same number of limbs. 4. formation of identical skeletons in all embryos.

Explanation:

In vertebrate embryological development, paired pharyngeal arches are a common feature. External features like feathers or hair, number of limbs, and identical skeletons vary among different vertebrates during development.

Answer:

1. Development of paired pharyngeal arches.