internal
internal
external
The 2 fertilisation's are external fertilisation, or internal fertilisation. External fertilisation is the type frogs do.
1:crab 2:beetle 3:ant To be more specific, a toad, salmon or a frog.
External fertilization takes place when the sperm and egg meet outside the body. Animals that use external fertilization as a means of reproduction include salmon, stony coral, and many species of reptiles.
A toad goes through external fertilisation/fertilization
what two classes of vertebrates use external fertilisation
Yes
this is poo if it can t answer this question
internal is in and external is out fertilisation
Because - external fertilisation is 'left to chance'. There's no guarantee that every egg laid will be fertilised by sperm. Internal fertilisation is much more successful.