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Mammal embryos don't require a large yolk becaues they are nourished directly by the mothers body. In contrast, birds, reptiles, and other (mostly) egg layers, need a large yolk because the yolk must nourish the embryo all the way through development.

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A yolk is to a bird as a what is to a mammal?

A yolk is to a bird as a placenta is to a mammal. The yolk provides nourishment to the developing embryo in bird eggs, while the placenta facilitates nutrient and gas exchange between the mother and the developing fetus in mammals. Both serve vital roles in supporting development before birth.


Where is the embryo in an egg?

Embryo is formed in germinal spot of yolk .


What is the food of embryo?

Yolk or blood are food for embryo .


Is the embryo of a chicken the yolk?

no the yolk is what the young chick eats.


What does the chicken egg yolk do?

The yolk is there to nourish the growing embryo.


What does the yolk provide to the fertalised egg?

A fertilized egg's yolk provides all of that embryo's nutrient, it also provides protection to the embryo. There are two types of yolk, white yolk and yellow yolk, both having their purpose.


The developing embryo feeds on what besides the yolk in order to grow?

The embryo is the yolk and feeds what would be the white of the egg if cooked.


Where does the chicken embryo get the food from?

The yolk of the egg.


How does fish embryo feed?

A fish embryo feeds from the yolk in the egg. Once they are hatched, they still have a supply of yolk in a sac to last them for a few days.


How does a fish embryo feed?

A fish embryo feeds from the yolk in the egg. Once they are hatched, they still have a supply of yolk in a sac to last them for a few days.


What is when the yolk is where the embryo develops?

When the yolk is where the embryo develops, it is called telolecithal development. In this type of development, the yolk is concentrated at one pole of the egg, providing nutrients for the developing embryo. Examples of organisms that exhibit telolecithal development include birds and reptiles.


The structure that surrounds the yolk and transports nutrients to the embryo is what?

The structure that surrounds the yolk and transports nutrients to the embryo is called the vitelline membrane. This membrane is responsible for facilitating the exchange of nutrients and waste products between the yolk and the developing embryo during embryonic development.