In most instances, both sexes of arthropods occur separately. Males commonly pass sperm to females in sealed packets called spermatophores. The males lay these packets on the ground, and the females later pick them up, or the male deposits them into the female's genital opening. Among crustaceans, millipedes, Spiders, mites and some insects, males transfer sperm directly to females. Source: MSN encarta
Internal fertilization is considered more advantageous than external fertilization for various reasons. The unborn baby is protected in the internal fertilization from any external threats.
internal fertilization
for reptiles it is internal fertilization and they can't do external fertilization
can toad have external fertilization
the reproduction of frogs are external fertilization. By Crystal
They Have Internal Fertilization
external fertilization is external
External fertilization and development
external fertilization
Salmon use external fertilization
Clams utilize external fertilization.
External Fertilization
they use external fertilization.
Salmon use external fertilization
external fertalisation
Internal fertilization is considered more advantageous than external fertilization for various reasons. The unborn baby is protected in the internal fertilization from any external threats.
external