MAKE CONNECTIONS Explain how the signaling molecules released by an embryonic cell can induce changesin a neighboring cell without entering the cell. (SeeFigures 11.15 and 11.16.)
Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
MAKE CONNECTIONS Explain how the signaling molecules released by an embryonic cell can induce changes
in a neighboring cell without entering the cell. (See
Figures 11.15 and 11.16.)
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