Biology
One of the following is not a function of bones.

Secretion of hormones for calcium regulation in blood and bones
Place for muscle attachment
Production of blood corpuscles
Protection of vital organs

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Biology
Which is not a function of the cell membrane?

Helps control the movement of materials into and out of the cell
Helps substances pass from the cytoplasm into the nucleus
Allows the cell to change shape under pressure
Keeps materials within the cell separated from the environment outside the cell

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