In the Drosophila ovary,which of the following proteins is secreted from the cap cell and is responsible for creating and maintaining the niche for germ-line stem cells?

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Hedgehog is secreted by the cap cells of the Drosophila ovary and is responsible for creating and maintaining the niche for germ-line stem cells. It is essential for regulating the self-renewal and differentiation of the stem cells. FGF (B) and Arm (C) are also involved in the regulation of stem cells, but they are not secreted by the cap cells. Ptc (D) is a receptor for Hedgehog and is not secreted by the cap cells.

In the Drosophila Ovary,which of the Following Proteins Is Secreted