It depends on the animal! Some reproduce by laying eggs, others by live birth.
All vertebrates reproduce sexually. Birds are one of the main groups of vertebrates, so they reproduce sexually.
No. Amphibians reproduce sexually, as all vertebrates do.
cheese
The development of an amniotic egg and internal fertilization allowed vertebrates to reproduce away from water.
No they don't; lions reproduce sexually, just like all other vertebrates.
They are very complex because they can reproduce
Some do and some don't. It just depends on what kind of animal it is...
True - they become pregnant after having sex. (Sexual reproduction)
Reptiles have scales. They are cold-blooded and reproduce by laying eggs.
All mammals reproduce sexually. Pretty much all vertebrates (fish, birds, mammals, reptiles, amphibians) reproduce sexually. Only some bacteria, some plants, fungi reproduce asexually.
No. Many organisms including most vertebrates reproduce sexually.
The amniotic egg allowed animals to reproduce on land, leading to the diversification of terrestrial vertebrates. This adaptation provided embryos with protection against desiccation and allowed for the colonization of diverse habitats.