Question

Cell membrane, human heart lens formula convex and concave lens

Answer 1

Answer:

cell membrane is a membrane with the cell is covered with the cell is covered by the certain type of membranes human heart lens human heart lens is used for seeing the Heartbeat and the convex lens and concave lens and the convex lens is a lens that the one side is silver and another site is not silver and a concave lens is a lens that the another side silver and the first sight is not silver

Explanation:

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