Where does the developing embryo in most mammals receive its nourishment?
Mother's body
Most mammals are viviparous: the embryo develops inside the mother's uterus.
The embryo is connected to the mother through the placenta and umbilical cord; nutrients and oxygen pass from the mother's blood to the embryo, and wastes pass back.
Egg shell is a protective covering of eggs in birds and reptiles; it does not nourish the embryo.
Egg yolk is the food store in eggs of birds, reptiles and egg-laying mammals, but most mammals have very little yolk.
Surrounding water supplies the developing eggs of many fish and amphibians with oxygen, not nourishment for a mammalian embryo.
Hence, the answer is Mother's body.
Similar Questions
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Important Questions from Reproduction
Cells of the tapetum possess dense cytoplasm and generally have ________.
Human chorionic gonadotropin:
Zygotes do not undergo reduction division immediately. They produce a multicellular body called a -
Which of the following organisms does NOT show asexual reproduction by means of fission?
The pollen needs to be transferred from the stamen to the stigma. If this transfer of pollen occurs in the same flower, it is referred to as __________ . On the other hand, if the pollen is transferred from one flower to another, it is known as ______
