Use the figure to answer the question.

Which of the following pairs of animals show that animals with widely different adult features can be each other's closest relatives?
A) Annelida and Nematoda
B) Chordata and Echinodermata
C) Cnidemia and Ctenophora
D) Annelida and Rotifera

Question

Use the figure to answer the question.

Which of the following pairs of animals show that animals with widely different adult features can be each other's closest relatives?
A) Annelida and Nematoda 
B) Chordata and Echinodermata 
C) Cnidemia and Ctenophora 
D) Annelida and Rotifera

Quizplus · Accepted Answer

Chordata and Echinodermata both have vastly different adult features, with Chordata including mammals, birds, reptiles, fish and amphibians, while Echinodermata includes animals like sea stars, sea urchins and sand dollars. However, recent genetic evidence suggests that they are each other's closest relatives, sharing a common ancestor that lived over 500 million years ago.

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