Here's why:
* Limited mobility: Embryos are developing organisms within a protective shell (egg) and lack the ability to move independently or search for food.
* Nutritional dependence: Embryos rely entirely on the yolk within the egg for nourishment. The yolk contains all the necessary nutrients, including proteins, fats, and minerals, to support their growth and development.
* Development within a protected environment: The egg provides a safe and controlled environment for the embryo to develop without the need to actively seek out food.
Exceptions:
* Some animals, like amphibians, lay eggs in water. Their larvae, which hatch from the eggs, may have the ability to find food independently.
* Some embryos have specialized structures within the egg that help them absorb nutrients from the surrounding environment, but they do not actively search for food outside the egg.
In summary, embryos are dependent on the yolk for food and do not actively seek food outside the egg.
