Early Members of the Reptiliomorph Lineage Were the First to Produce

Question

Early members of the reptiliomorph lineage were the first to produce
A)neotenic larvae.
B)amniotic eggs.
C)urea as a nitrogenous waste.
D)tadpole larvae.
E)isolecithal eggs.

Accepted Answer

Early reptiliomorphs were the first to produce amniotic eggs, which allowed for their embryos to develop independently from water and had adaptations for gas exchange, waste removal, and protection. This was a major evolutionary development that allowed for the successful colonization of terrestrial environments.

Note: None of the other options are correct - neotenic larvae are seen in some salamanders and axolotls; urea as a nitrogenous waste is seen in some amphibians and mammals; tadpole larvae are seen in frogs and toads; isolecithal eggs have evenly distributed yolk, which is seen in certain fish and insects.