作者:eva fernandez 3 年以前
254
Reproductive patterns
Reproductive patterns
Oviparous
Crocodiles, chickens, insects...
Internal or external
Hatch from eggs
Oviviparous
Seahorses, snakes...
Feed on the nutritional material of the eggs
The eggs remain inside the mother until they hatch
Viviparous
Examples
Cats, dogs, humans...
How is fertilization?
Internal
How do embryos feed?
Nourished through the placenta
How are they born?
Mothers give birth when they are fully grown