Evolutionary reversals (character losses) are also common among living members of a vertebrate lineage and early members of the lineage. Choose examples that illustrate this observation. Select the three correct statements. Select the three correct statements. Hagfishes lack legs. Birds have shelled eggs. Sharks lose old teeth. Sharks have eggs with protective coats. Living birds lack teeth. Most mammals lack shelled eggs. Whales and snakes lack legs.

Living birds lack teeth.

Most mammals lack shelled eggs.

Whales and snakes lack legs.

Explanation:

Living birds lack teeth, Most mammals lack shelled eggs and Whales and snakes lack legs are the characteristics that are present in modern animals as compared to their ancestors. These changes occur in the organism due to evolution that occurs with the passage of time and the main reason for that is  change occurs in the environmental conditions for organism which force them to make changes which is best for the environment.

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