There are different types of reproduction when it comes to animals. Some animals lay eggs, while others give live birth. There is also a type of reproduction known as fragmentation.
Frogs are a good example of animals that lay eggs. During the springtime, frogs lay their eggs under the water. It only takes two weeks for those frog eggs to hatch and then a tadpole emerges. Approximately nine weeks later, those tadpoles begin to grow limbs. Front legs and back legs begin to form. By the time the creature is eleven weeks old, it has become an adult frog.
Butterflies also lay eggs. They lay their eggs on leaves where they will grow into caterpillars. When caterpillars enter the pupa stage, they form a chrysalis where they will remain until the metamorphosis is complete. Then they emerge as a butterfly.
Mammals are a good example of animals that reproduce by giving live birth. Mammals always give live birth. The eggs are developed inside the mother’s body in most mammals.
Worms reproduce with a process called fragmentation. The bodies of worms split in two so that there are then two worms instead of one.
Birds hatch from eggs, but they are different than frogs and butterflies. Birds are more similar to other animals in the fact that they hatch in their basic adult form. They are infants, of course, but it’s still just a younger version of their adult bodies. Frogs hatch with gills and later develop lungs. Butterflies hatch as caterpillars and later grow wings so that they can fly. Therefore, frogs and butterflies do not hatch in their basic adult form.