Birds lay eggs, although there are other egg-laying animals, including two mammals: the duckbill platypus and the echidna. These two creatures are natives of Australia. Scientists call these primitive egg-laying mammals monotremes.Continue Reading
Most reptiles lay eggs; however, some snakes have live births. According to Nature World News, a recent discovery by scientists show that ancient snakes and lizards all gave live birth. Egg laying was an evolutionary change to ensure survival of the offspring. Only 2,000 of the 10,000 modern species of lizards and snakes have live births, while the rest lay eggs.
Sea turtles lay eggs. While the male and female mate at sea, the female comes ashore to lay her eggs, normally at high tide. She digs a pit in which she deposits 50 to 200 eggs. She covers the eggs with sand, spending only a couple of hours out of the water. She may repeat the process several times during the session.
In seahorses, the female deposits the eggs into a pouch located on her mate's abdomen. The male fertilizes the eggs in the pouch and they develop there, depending on nourishment from their yolk sacs. Once the embryos develop, the male gives birth to new seahorses.Learn more about Animal Reproduction
Animals that lay eggs are known as oviparous animals and include fish, birds, reptiles and insects. These types of animals have little to no other development within the mother. Mammals that lay eggs instead of giving birth are known as monotremes.Full Answer >
The platypus and four species of echidna or spiny anteater are the only living monotremes. They are native to Australia and New Guinea. Fossil evidence suggests that they may have lived in South America as well.Full Answer >
The primary way that animals, or more specifically, animal cells store glucose is in a compound known as glycogen. Glycogen is primarily stored by liver cells, but some is also stored in muscle cells for immediate use if needed. Glycogen molecules consist of many thousands of glucose molecules linked together by alpha acetal groups in a highly branched, very compact form.Full Answer >
Some animals that mate for life are gibbons, black vultures, wolves, albatrosses and prairie voles, according to Mother Nature Network. Gibbons are the closest relatives to humans that form lifelong bonds and mate for life.Full Answer >