Why do some animals produce more eggs?

As the females grow, their larger ovaries can hold more eggs “so if the fish doubles in length,” the number of eggs will “multiply by 30 or 60,” Coleman says. It’s understood among those who fish not to take large females, “because in some species the largest females are equivalent 30 or even 60 small females.”

Why do reptiles lay fewer eggs than amphibians?

Reptiles lay fewer eggs than amphibians because their eggs are larger.

Which animal lay only a few eggs in its nest?

Insects, turtles, lizards, and reptiles lay eggs, too. Only two mammals lay eggs: the platypus and the echidna. All other mammals give birth to live babies. Of all the birds that lay eggs, hummingbirds lay the smallest eggs, and ostriches lay the biggest eggs.

Why some animals lay eggs and others don t?

Why do some animals lay eggs, and others give live birth? The reason that some animals lay eggs is because that is more beneficial to them than than it is to give birth to a live offspring. Birds, for example, all lay eggs because they can’t fly with the weight of their babies inside of them.

Why does a crocodile lay fewer eggs than a turtle?

Crocodilians may experience less selection pressure to delay nesting because, unlike turtles, they are well-equipped to protect themselves and their nests from most predation.

Why do some animals lay a few eggs Science Year 2?

The reason that some animals lay eggs is because that is more beneficial to them than than it is to give birth to a live offspring. Birds, for example, all lay eggs because they can’t fly with the weight of their babies inside of them.

Why did animals start laying eggs?

A Strategic Choice. Early female animals laid eggs in the sense that they released their ova into the world, often thousands at a time. Sperm released by males then fertilized some of these eggs in a hit-or-miss fashion, and the resulting embryos took their chances on surviving in the hostile world until they hatched.