Is there an embryo in every egg?

Here's why:

* Fertilization: An embryo only forms when an egg is fertilized by a sperm. Unfertilized eggs are simply the female reproductive cells.

* Egg Production: Animals like chickens, for example, lay many eggs, but only a small percentage are fertilized. These unfertilized eggs are meant to be potential offspring and are not viable to develop into a chick.

* Purpose of Eggs: In many species, eggs serve different purposes beyond reproduction, such as providing nutrients or attracting mates.

In summary:

While eggs have the potential to contain an embryo, they only do so if they have been fertilized. Most eggs we encounter are not fertilized and therefore do not have an embryo.