Is there a difference between fertilized and eggs?

Absolutely! There's a big difference between a fertilized egg and a regular egg.

Here's a breakdown:

Unfertilized Egg:

* Definition: An egg that has not been combined with sperm.

* What it contains: It contains the female genetic material (the yolk) and nutrients for a potential embryo.

* Development: It will not develop into an embryo unless fertilized.

* Examples: The eggs we buy at the grocery store, bird eggs, etc.

Fertilized Egg:

* Definition: An egg that has been combined with sperm.

* What it contains: It contains both male and female genetic material, ready for development.

* Development: It will develop into an embryo and eventually a fetus.

* Examples: The fertilized egg that develops into a chick inside a bird egg, or a human embryo after conception.

In short: Unfertilized eggs are potential beginnings, while fertilized eggs are the start of a new life.