What controls cell differentiation within
organisms?

often controlled by cell signaling

Explanation:

meaning of the signal molecules that conversate information from cell to cell during the control of cellular differentiation are called growth factors

answer; ///the correct answer to the above statement is (cytoskeleton);

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.