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Which group of animals does not lay egg?
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It is generally accepted that the two vertebrate groups that laytheir eggs in water are Fish and Amphibians. However, this is not strictly true, as not all amphibians lay t…heireggs in water. Many species of frogs lay their eggs in water, butnot all do, e.g. the Corroboree frog. Also, frogs of the genus Pristimantis lay their eggs on land, wherethey do not undergo a tadpole stage, hatching as fullymetamorphosed baby frogs. Some amphibians do not even lay eggs.Some species of frogs even give birth to live young, such asmembers of the African genus Nectophrynoides and other species found in the Andes andCentral America . There are also some salamanders which give birth to young which areeither larvae, or already metamorphosed. Caecilians are a type of amphibian, rather like a worm, whichgive birth to fully metamorphosed young.
Egg-laying mammals are known as monotreme. They are of the Order monotremata. Apart from monotremes, other animal groups which lay eggs are birds, reptiles fish and amphib…ians. Only the birds lay eggs exclusively. Among the reptiles, fish and amphibians, some are live-bearers.
All mammals (excluding the platypus and echidna), very few reptiles (such as the boa constrictor and rough snouted gecko), and certain species of fish and other marine animals… (though very few) give life birth rather than laying eggs.
Birds . Reptiles . Fish (some) . Amphibians (most) . Monotremes - a class of mammal
ostrich is laying eggs in the dirt....
Monotremes are egg-laying mammals, and their eggs are not hard-shelled, but leathery. The monotremes include the platypus and echidna . Reptiles also lay rubbery/leath…ery eggs.
This description does not fit any known living animals. Reptiles are cold-blooded, breathe with lungs, usually lay eggs and have scaly skin , but they do not have scale…s. The only creatures with scales are fish, and they do not breathe with lungs.
reptiles lay leathery hard eggs and have scales some live on land. Correction: Reptiles do not have scales, but scaly skin. There is a difference. Also, not all repti…les live on land, and not all reptiles lay eggs. Some species give birth to live young.
Laying eggs in groups makes them easier to keep warm and safe and increases chance of the hatchlings' survival. Birds keep eggs in nests, where it is necessary to lay eggs in …groups to facilitate feeding and care-taking. Fish lay eggs in groups so that predators cannot eat all of the eggs because there are so many in one place at one time.
Reptiles have scaly skin, and those that lay eggsdo so on land. (Some reptiles give live birth.)
The sub-group of mammals which lay eggs are called monotremes. This group includes the platypus and the two species of echidna.
All groups of animals lay eggs. The one most commonly defined as non-egg-laying is the group known as mammals. Almost all mammals give birth to live young. The exception to …this are the three species of monotremes , or egg-laying mammals, and they include the platypus and the two species of echidnas. Within the other vertebrate groups, only the "Birds" are all egg-layers. There are some species of fish, reptile and amphibians which do not lay eggs.
I'm not exactly sure, but I do know that a dinosaur called the Pterosaurs laid soft eggs.