In mammalian development, the function of the yolk is to

Assessment: JAMB UTME - Biology - 1992 Subject: Biology

Question 1 Report

In mammalian development, the function of the yolk is to
Answer Details
Mammals are classified as placental or non-placental mammals. Non-placental mammals have eggs with a large yolk sac which provides nutrients to the developing embryo. However, placental mammals, including humans, do not have a yolk sac in their embryos. Instead, the placenta serves as a connection between the mother's blood supply and the developing embryo, providing nutrients, oxygen and removing waste. Therefore, in mammalian development, the yolk sac does not have a function in placental mammals.
Read lesson note on Organization Of Life (WAEC)
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