Why do mammals lay eggs?

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.

Why do mammals not lay eggs?

Therefore, mammals already had milk before they stopped laying eggs. Lactation reduced dependency on the egg as a source of nutrition for developing offspring, and the egg was abandoned completely in the marsupial and placental mammals in favor of the placenta.

Can humans mate with Pokémon?

One of the myths he relates explains that, once, humans and Pokémon intermingled, because they were all made from the same spirit. Pokémon can interbreed with each other despite vast anatomical differences because they have the same spirit, or essence.

What are the names of the mammals that lay eggs?

There are three orders of the class Mammalia : monotremes , marsupials, and placental mammals. Monotremes are the only mammals that lay eggs. There are only two egg-laying mammals on the planet: the duck-billed platypus and the spiny anteater (or echidna).

Are there any male animals that lay eggs?

Amphibians lay eggs that are fertilized externally by the males. Reptiles include crocodiles, snakes, lizards, and turtles. These animals are adapted to live on land or in water.

What are some examples of mammals that lay eggs?

with webbed feet.

  • Short-beaked echidna. The short-beaked echidna resembles a small anteater.
  • Sir David’s long-beaked echidna.
  • Western long-beaked echidna.
  • Eastern long-beaked echidna.
  • Do some marsupials lay eggs?

    Marsupials are a class of mammals that give birth to very immature young that after birth navigate to a milk teat to feed from that until relatively mature. There are two other classes of mammals. The placentals such as humans that are nurished via the placenta, and the montremes which actually do lay eggs.