The figure shows where tetrapod limbs evolved ("Origin of tetrapod vertebrates") in the evolutionary history of animals. Based on this figure, in which limbless organisms would you expect to find vestigial limbs?
A) jellyfish
B) annelid worms
C) fishes
D) snakes

Question

The figure shows where tetrapod limbs evolved ("Origin of tetrapod vertebrates") in the evolutionary history of animals. Based on this figure, in which limbless organisms would you expect to find vestigial limbs? 
A) jellyfish 
B) annelid worms 
C) fishes 
D) snakes

Quizplus · Accepted Answer

According to the figure, tetrapod limbs evolved from lobe-finned fish and are absent in snakes, which are descendants of limbless lizards. Therefore, in snakes, we would expect to find vestigial limbs that are remnants of their ancestors' limbs.

The Figure Shows Where Tetrapod Limbs Evolved ("Origin of Tetrapod