The extra embryonic membranes of the mammalian embryo are derived from
Formative cells
Follicle cells
Trophoblast
Inner cell mass
Which of the following is correct
Placenta is formed from
In humans, at the end of the first meiotic division, the male germ cells differentiate into the
In which of the following animal cleavage divisions are restricted to a small part of cytoplasm & nucleus in animal pole of egg
Structure connecting the foetus to placenta is