Because.
Reptiles ONLY have internal fertilization
Dinosaurs were reptiles and like all reptiles, use internal fertilization.
Internal fertilization
All reptiles are internal
internal fertilization
Since most reptiles have hard shells, it would be impossible to fertilize an egg after it is laid. Therefore most reptiles perform a sort of internal fertilization.
In reptiles, fertilization usually takes place internally inside the female's body. Male reptiles deposit sperm inside the female through cloacal contact during copulation. The sperm then fertilizes the eggs within the female's reproductive tract.
Fertilization is exclusively internal in most mammals and some reptiles, such as birds and most viviparous (live-bearing) species. In these species, sperm fertilizes the egg inside the female's body, before the zygote develops and the offspring are born alive.
Internal... :)Male and female reptiles do not have external genitalia to help owners ... For fertilization, a male reptile inserts either one of his two hemipenes into the ... Before actual copulation, the pair usually engages in some type of ritualized courtship...Good luck with what your doing... :)
Birds, mammals and reptiles carry out internal fertilization. This is evidenced by the fact that the eggs are stored internally during fertilization. The egg develops inside of the mother.
becaus of all the the bacteria creates nitrates which all plants need
internal fertilization