![]() ![]() Birds and frogs are examples of oviparous animals. In these animals, the process of both fertilization and embryo development does not occur inside the mother. Which of the following is an oviparous animal?Īnimals that reproduce by laying eggs are called oviparous animals. The eggs of birds such as hen and duck carry immature embryo in them. In oviparous animals, fertilization takes place internally but embryo development takes place externally. What is the difference between embryo development in oviparous animals? The female platypus digs a hole in the ground and lays her eggs. The duck-billed platypus (Ornithorhynchus anatinus) is an egg-laying semiaquatic mammal native to Tasmania and the neighboring areas of eastern Australia. Do platypus lay eggs or give birth?ĭuck-Billed Platypus. Although they are classified as mammals, they exhibit characteristics common with non-mammalian animals. Both species are found in New Guinea, Australia, and Tasmania. There are only two known species of egg-laying mammals: the duck-billed platypus and the spiny anteater also known as the echidna. There are only 2 mammals that lay eggs and one is the Platypus. The criteria for being a mammal is, it has to be warm-blooded, has hair or fur, and have mammary glands. Mammals are warm-blooded animals, as reptiles are cold-blooded. Here is a closer look at some of the physical and anatomical characteristics of chickens that demonstrate why they are neither reptiles nor mammals: Can a mammal lay eggs without being cold blooded? They are birds, and further classified as a fowl as fowls are birds kept for meat or eggs. The proper answer is technically speaking, chickens are neither mammals nor reptiles. They both lay eggs that are diverse internally and externally. Birds are almost found everywhere, while most reptile are only in specific location. When comparing today’s modern reptile eggs, and bird eggs we see many differences that are still being studied. What is the difference between reptile eggs and bird eggs? ‘Monotreme’ is the technical name for egg-laying mammals. There are only five living monotreme species: the duck-billed platypus and four species of echidna (also known as spiny anteaters). To be fair duck-billed platypus is not the only animal that lays eggs. *Duck-billed platypus is not the only animal that lays eggs. Oviparous animals include birds, reptiles, amphibians, and fish. Fertilization is either internal or external but the eggs hatch in an external environment and not in the mother’s womb. Oviparous animals are animals that lay eggs. Many Arthropods lay eggs, such as the black beetle pictured. Most fish, reptiles, amphibians, and birds are oviparous. Which of the following animals are oviparous? Beside egg-laying, monotremes possess other traits that separate them from other mammals. Egg-laying mammals belong to a group called monotremes. ![]() There are exceptions to every rule, some reptiles and fish bear live young, and some mammals lay eggs. Large macrolecithal eggs, develop independent of water. Chicken eggs have a hard shell while reptile eggs have a soft, leathery shell. The eggs laid by some reptiles even smaller, and those of insects and other invertebrates can be much smaller still. What is the difference between reptile and chicken eggs? ![]() Unlike other mammals, but very like reptiles and birds, monotremes only have one body opening for the disposal of waste and procreation. These are similar to most reptile eggs, in that they’re soft-shelled. Then there are the mammals who lay eggs the monotremes.
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