The Earth is the third planet from the sun. When an insect molts it loses its old exoskeleton and grows a larger one to replace it. Caterpillars molt four to five times during their development. An ecosystem is the interrelationships between all of the living things in an area. Amphibians, most fish, and most reptiles are ectothermic.
Some animals hatch from eggs.
An embryo is a very young, unborn organism. The emerald tree boa, Corallus caninus , is a green snake with white bands. This snake catches food with its long teeth then squeezes it. It eats birds and rodents. This snake has a life span of 15-20 years.