While sour taste's original purpose was to warn vertebrates of danger, in a few animal groups, including us, its role has reversed. The taste of danger became something it was dangerous for us to avoid.

Join the Amoeba Sisters in exploring some general animal characteristics, major vocabulary used in classifying animals (such as symmetry, protostome vs deuterostome, cephalization, and coelom), and take a general tour of 9 major animal...

In this video, the teacher discusses various types of rodents, their characteristics, habitats, and ecological roles. The video also clarifies misconceptions about otters and other animals being rodents. It provides interesting facts...