Reproduction
Reproduction is the process by which living things create more of their own kind. There are two general types of animal reproduction
Asexual Reproduction
In asexual reproduction only one parent produces the young animal.
For example ; planarians and some other flatworms can reproduce by dividing the body into two or more pieces, one whit the head and the other with the tail. Each piece will then grow into complete new individual. The animals that have asexual reproduction also include sponges and sea anemones.
Sexual Reproduction
In sexual reproduction. Two parents of opposite sexes are needed to produce the offspring. Such animals as sharks, birds, reptiles and mammals mate when the male puts sperm into the female’s body. Fish lay eggs. Then the make swims over the eggs and drops sperm on them to start the fertilization.
(Fertilization : the process in which the sperm unites with the egg)