What characteristics do animals that lay eggs have?

lay eggs with a hard shell. are covered with feathers.have a beak.have two legs.have two wings and most can fly (ostriches and penguins are exceptions)have hollow bones. are warm-blooded.

What is called to mammals that lay eggs?

Egg-laying Mammals

Monotremes are not a very diverse group today, and there has not been much fossil information known until rather recently. In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth.

What are the examples of Ovoviviparous animals?

Some examples of ovoviviparous animals are sharks, rays, snakes, fishes, and insects. Oviparity is different from ovoviviparity in a way that the eggs in oviparity may or may not undergo internal fertilization but are laid and depend on the yolk sac to get nourished till the time they hatch.

What are the four egg-laying animals?

Animals that lay eggs:
  • Birds are warm blooded and lay eggs. …
  • Fish are cold-blooded vertebrates. …
  • Amphibians are cold-blooded vertebrates and can live on land and in water. …
  • Reptiles use the heat of the sun to keep their blood warm. …
  • Insects are the biggest group of living things, apart from bacteria.

What are the three classifications of mammals?

Mammals can be generally classified into three broad groups: egg-laying monotremes, marsupials, and placentals. A marsupial is a mammal that raises its newborn offspring inside an external pouch at the front or underside of their bodies.

What are the 5 mammals that lay eggs?

The Extant (Currently Alive) Species of Egg-laying Mammals Are:
  • The Duck-Billed Platypus. …
  • The Short-Beaked Echidna. …
  • The Eastern Long-Beaked Echidna. …
  • Sir David’s Long-Beaked Echidna. …
  • Western Long-Beaked Echidna.

Which of the following animals lay eggs answer?

Animals which lay eggs are known as oviparous animals. E.g., hen, lizard, frog, etc.

What are the 3 mammals that lay eggs?

Only five species of animals share this extraordinary egg-laying trait: the duck-billed platypus, and four echidna species, the western long-beaked echidna, eastern long-beaked echidna, short-beaked echidna, and Sir David’s long-beaked echidna.

Is Rabbit a egg-laying animals?

Because bunnies are not egg-laying animals. Rabbits, like most mammals, are viviparous, which means that their young develop inside the mother, and are birthed into the world live.

What are the 3 mammals that lay eggs?

Only five species of animals share this extraordinary egg-laying trait: the duck-billed platypus, and four echidna species, the western long-beaked echidna, eastern long-beaked echidna, short-beaked echidna, and Sir David’s long-beaked echidna.

Why do mammals lay eggs?

The reason that odd, egg-laying mammals still exist today may be because their ancestors took to the water, scientists now suggest. The egg-laying mammals — the monotremes, including the platypus and spiny anteaters — are eccentric relatives to the rest of mammals, which bear live young.

Did mammals once lay eggs?

Despite evidence that the earliest examples of creatures such as mammals and reptiles gave birth to live young, they actually may have laid eggs, a scientist argues.

What does it mean to lay eggs?

(of a bird or other egg-creating animal) To produce an egg. (idiomatic, of a person, organization, etc.) To produce a failure or flop; to do something which is unsuccessful. That author usually writes good stuff, but he really laid an egg with that last piece.

Do penguins lay egg?

A nest of eggs is called a clutch, and with the exception of emperor and king penguins, clutches usually contain two eggs. (Emperor and king penguins lay a single egg.) A clutch with more than one egg presents a better chance of at least one chick surviving.

Do dolphins lay eggs?

Other characteristics of dolphins that make them mammals rather than fish are that they give birth to live young rather than laying eggs and they feed their young with milk. Also, like all mammals, dolphins even have a tiny amount of hair, right around the blowhole. Whales and porpoises are also mammals.

Do crocodiles lay eggs?

A single female typically lays a clutch of between 30 and 60 eggs that incubate for 80 and 90 days. Temperatures of the nest during a period of incubation determine the sex of the hatchling crocodiles.

Do shark lay eggs?

There are over 500 species of shark living in waters around the world and the majority give birth to live young. The remainder are oviparous, meaning they lay eggs. Around 40 to 50 different shark species live permanently in or regularly visit the waters surrounding Britain.

Do rats lay eggs?

No, rats do not lay eggs. Contrary to what people believe, rats are mammals that give birth to live young. This is a characteristic of viviparous animals. There are two options for animals to bring their offspring into the world.