How do birds develop without a placenta?

The tadpoles take their food from the yolk of an egg. The egg yolk is equivalent to the placenta. T he placenta attaches itself to the uterus to provide the developing foetus with blood and oxygen.

Answered by gocanones1 | 2024-06-10

**Because they do not give birth to young ones directly. ** ;

Answered by JenelleTeeters | 2024-06-12

Birds develop without a placenta because they lay eggs that contain yolk, which provides nutrients to the embryo. This process involves several extraembryonic membranes that protect and support development. Once fully developed, the chick hatches from the egg to begin life outside.
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Answered by JenelleTeeters | 2024-10-12