Question
Differentiate between internal fertilisation and external fertilisation.
| Internal fertilisation | External fertilisation |
| It is the fertilisation that takes place inside the female body. | It is the fertilisation that takes place outside the female body, generally in water. |
| Sperms are released in female body. | Sperms and ova are released in water, outside the female body. |
| It is common in terrestrial animals, e.g. humans, cats, dogs, etc. | It is very common in aquatic animals, e.g. frogs, fishes, etc. |
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