Sperm and egg coming together
Opossums are marsupial mammals - they have internal fertilization as all mammals do.
yes
Whales are mammals. They have internal fertilization.
All mammals use internal fertilization.
Intertnal --
Fallopian tubes
external fertilization
I am not a biologist, but I believe that all mammals have internal fertilization.
Interior, like all mammals (or is it most mammals?)
Mammals.
embryo
For female mammals, the fallopian tubes.