Which pair consists of mammals despite unusual reproduction or locomotion?
- Aptenodytes and Struthio
- Ornithorhynchus and Pteropus
- Exocoetus and Hippocampus
- Salamandra and Ichthyophis
Show answer and solution
Correct answer: B. Ornithorhynchus and Pteropus
Ornithorhynchus is an egg-laying mammal and Pteropus is a flying mammal. Mammary glands define their class; live birth and inability to fly are not universal mammalian traits.