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
the reproduction of frogs are external fertilization. By Crystal
internal
Internal fertilization occurs inside the female's body, where sperm fertilizes the egg, while external fertilization occurs outside the body, usually in water, where eggs are fertilized by sperm. Internal fertilization is common in land-dwelling animals, while external fertilization is common in aquatic animals. Additionally, internal fertilization provides better protection for the developing embryos compared to external fertilization.
Some animals that have external fertilization include fish, frogs, sea urchins, and certain aquatic invertebrates like jellyfish and corals.
They Have Internal Fertilization
external fertilization is external
external fertilization
External fertilization and development
Clams utilize external fertilization.
Salmon use external fertilization
they use external fertilization.
Salmon use external fertilization
external
external fertilization
Frogs have external fertilization.
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