Heterotrophs — Heterotrophs are organisms that cannot produce their own food and obtain nutrients by consuming other organisms.
Locomotion — Most animals move from one place to another mainly in search of food or shelter. Such a movement is called locomotion.
Invertebrates — The animals that do not have a back bone are called invertebrates.
Vertebrates — Animals with a backbone (vertebral column) are called vertebrates.
Mammals — Mammals are animals that gives birth to young ones (babies), and feeds its young on milk from the mother's body. Mammals have body covered with hair, possess projecting external ears, have four limbs, and a tail (except humans).