Do birds have external fertilization or internal fertilization?
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Similarly, do fish have external or internal fertilization?
Cartilagenous fish (sharks, skates, rays, chimaeras) eggs are fertilized internally and exhibit a wide variety of both internal and external embryonic development. Most fish species spawn eggs that are fertilized externally, typically with the male inseminating the eggs after the female lays them.
Also, do frogs have internal or external fertilization? Typically, frogs lay eggs. This process usually occurs through external fertilization, where the female releases her eggs from her body into water. Then, the male releases his sperm to fertilize them. However, a few species of frog use internal fertilization.
Also to know is, is internal fertilization better than external fertilization?
Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Fewer offspring are produced through this method, but their survival rate is higher than that for external fertilization.
How do birds reproduce sexually?
Birds reproduce sexually and have internal fertilization. Mating is generally preceded by courtship. Birds' amniotic eggs have hard shells and are laid in a nest. The eggs are usually incubated until they hatch.