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Hens and frogs are both oviparous exhibiting different types of fertilisation, explain.
1. The hens are oviparous or viviparous animals?
2. How does fertilization occur in frogs, internally or externally?
3. What surrounds fertilized frog eggs for protection?
4. Where does the development of the frog embryo take place, inside or outside the body?
Answer variants:
Externally
Outside
Oviparous
Internally
Viviparous
Jelly
Hard
Inside
