Question

explain how the amniotic egg enabled animals to venture further on terrestrial habitats and away from water, also comment on the advantages involved that enabled for a faster growing enbryo within the amniotic egg. (Zoology)

Answer 1

Ans: Amniotes lay their eggs on land, unlike amniotes that lay their eggs on water. Eggs of amniotes had distinct features that allowed amnioes to reproduce on land and not requiring water for their reproduction. These features included the production of eggs with amnion. Amion covered the embryo when first developed and provided protection and nutrition for its development. Eggshell also prevents eggs from dehydration. Other features for efficient production on land include leathery, calcium-containing and strong eggshells and the presence of allantois that could facilitate respiration while providing a reservoir for disposal of wastes. These features allowed reptiles to colonize land.

Advantages of amniotic eggs - It allows embryo to grow at a faster rate as it protects egg from aquatic predator and also reduce water competition in which larva can mature.