The environment specific species of plants and animals depend on to survive. Herbivore An animal that eats only plants. Hibernation A sleep-like state that some animals go into during winter. The body temperature drops and the metabolic rate slows down, which means the animal uses less energy and does not need as much food to survive. Invertebrates Animals with no backbone.
Many invertebrates have an exoskeleton.
Marsupial An animal, like the opossum and kangaroo, that the female has a pouch where the young stay until they are fully developed. Metamorphosis A complete change in body shape, like when a tadpole changes into a frog. Mobile Able to move easily and quickly. The back part of the neck. Nocturnal Animals that sleep during the day and hunt for food at night.