Multiple choice

From the evolutionary point of view, which one among the following is the most primitive animal?

  1. Dolphin

  2. Otter

  3. Turtle

  4. Walrus
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Turtles are reptiles that belong to an ancient lineage dating back around 220 million years. Dolphins, otters, and walruses are mammals that evolved from land ancestors much more recently in evolutionary terms. Reptiles appeared much earlier than mammals.

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