Amphibians undergo external fertilization and need to do this in the water. Both the male and female amphibians release their gametes close to each other after which fertilization will take place.
Birds have internal fertilization like human beings. The majority birds do not have a penis. So, they mate just by pressing their cloacae mutually and the male shoot sperm into the female (as the cloaca is the only one hole in birds through which they mate, excrete and lay eggs). The male sperm then swims up the female's oviduct and fertilises her eggs which is an internal fertilization. It's only after this that the egg is coated in shell and laid.
snakes are reptiles and they have internal fertilization, they give birth to live young
No. They have internal fertilization.
Yes
external because they can change over time.
what two classes of vertebrates use external fertilisation
spiders
external
The 2 fertilisation's are external fertilisation, or internal fertilisation. External fertilisation is the type frogs do.
Yes
Yes.
yes,sometimes
A toad goes through external fertilisation/fertilization
internal
External
Yes