The inhibitors of the electron-transport chain are substances that bind to some of the components and block the passage of electrons at different points in the chain. a. True
b. False

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.

i think the answer is a.keratin is the pigment responsible for skin color.

answer; synapse;