Mammalian egg contains negligible yolk so the survival of such embryo is made possible by the fact that they are
Nourished through placenta
MiIkfed
Too small and need no much food
None of the above.

Question

Mammalian egg contains negligible yolk so the survival of such embryo is made possible by the fact that they areNourished through placentaMiIkfedToo small and need no much foodNone of the above-

Toppr Admin · Accepted Answer

All mammals except the monotremes are viviparous- In viviparous animals -such as humans - the eggs have hardly any food reserve- In these animals- embryo receives nutrients from the mother through a special structure called placenta and remains enclosed in the womb -uterus- until birth- This kind of situation is found in higher mammals -eutherians- and some fishes -sharks- In contrast- eggs of oviparous and ovoviviparous animals contain yolk which is utilized by the developing embryo- The yolk contains all the required nutrients- This kind of situation is found in fishes- amphibians- reptiles- birds and primitive mammals-xA0-

Mammalian egg contains negligible yolk so the survival of such embryo is made possible by the fact that they areNourished through placentaMiIkfedToo small and need no much foodNone of the above.

Mammalian egg contains negligible yolk so the survival of such embryo is made possible by the fact that they are
Nourished through placenta
MiIkfed
Too small and need no much food
None of the above.