Several major groups of animals typically have readily distinguishable eggs.
Fish and amphibian eggs
The most common reproductive strategy for fish is known as oviparity, in which the female lays … 查看更多內容

The cycle of the egg's formation is started by the gamete ovum being released (ovulated) and egg formation being started. The finished … 查看更多內容

Food
Eggs laid by many different species, including birds, reptiles, amphibians, and fish, have probably been eaten by people for millennia. … 查看更多內容

• List of egg topics
• Animal shell
• Butterfly eggs
• Egg white
• Fossil egg
• Haugh unit 查看更多內容

All sexually reproducing life, including both plants and animals, produces gametes. The male gamete cell, sperm, is usually motile whereas the female gamete cell, the ovum, is generally larger and sessile. The male and female gametes combine to produce the 查看更多內容

Scientists often classify animal reproduction according to the degree of development that occurs before the new individuals are expelled from the adult body, and by the yolk which the egg provides to nourish the embryo.
Egg size and yolk 查看更多內容

Egg collecting was a popular hobby in some cultures, including European Australians. Traditionally, the embryo would be removed before a collector stored the egg shell.
Collecting eggs of wild birds is now banned by … 查看更多內容