Question

Suggest why it is an advantage for birds to lay hard shelled eggs​

Answer 1

Answer:

While reptiles were the first to have eggs that could survive on land, birds gained an advantage when they developed eggs that had a hard shell. They were stronger and could support the embryo inside through harsher conditions like rolling out of a nest.

Answer 2

While reptiles were the first to have eggs that could survive on land, birds gained an advantage when they developed eggs that had a hard shell. They were stronger and could support the embryo inside through harsher conditions (like rolling out of a nest).