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ALOT. All mammals except the platypus.

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Q: What animals develop internally?
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Related questions

Do birds develop externally or internally?

Birds develop internally, which means inside the creatures body.


Do reptiles develop internally or externally?

exernally


Do fish develop internally or externally?

Most fish eggs develop outside of the body. There are however around 3% of all fish which fertilize internally.


What are 10 animals that fertilize internally?

GiraffesElephantsRhinosPenguinsOrangutansWhalesSnakesTurtlesChickenMosquito


What are the five animals that fertilize internally?

Actually,the chicken,dog,cat,turtle,and the mosquito fertilize internally.


What are the animals that develop inside the bodies of parent animals?

example of develop inside the body of animals


Why do land animals fertilise internally?

There is no external water source to carry the sperm


How do animals develop without a placenta?

Animals that do not develop in a placenta will develop outside of the uterus rather than in. Kangaroos and Koalas use pouches to develop their young.


Are snakes oviparous or viviparous?

No, actually there is a third choice. They are ovoviviparous as their eggs develop internally and they bear live young.


What is the sequence in which most animals develop?

There is a very simple sequence in which most animals develop. Most animals are born, mature, reproduce, and then die.


What do animals possess what can help them reproduce?

There are a great number of characteristics that animals posses that can help them reproduce. The ability to fertilize internally is one of them.


Which is healthier plants or animals?

Plants could clean and heal the body. Plants can also clean animals internally, when taken orally.