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They get their nourishment from the yolk inside the egg. As the embryo develops, it absorbs the yolk until it's ready to hatch.
it is a penguin in which lives in Antarctica
yolk
exosperm
It's a sack and not an egg but the primary food source, the only one, is the placenta and the nutrients go via the umbilical cord.
The placenta is the part of the amniotic egg that supplies food to the developing animal. The yolk provides it with food, and the albumin supplies water and nutrients.The Yolk. Yolk is a sac that is attached to the embryo that supplies food.
Genes control the sex of a developing embryo.
Genes control the sex of a developing embryo.
endosperm
When the human egg is fertilized and becomes a zygote and then a developing embryo, it derives its food from the placenta.
The developing embryo is nourished by the yolk sack until implantation. Upon implantation the placenta begins to develop, the placenta acts as the fetal lung , it transports oxygen to the fetus and carbon dioxide away from the fetus via the umbilical cord. The placenta also provides stored carbs for the developing fetus.
to provide nourishment to the developing embryo in a seed