Answer:
the answer is A. specific composition and structure, and contains one or more silicon-oxygen tetrahedrons.
Explanation:
Answer:
Explanation:
The color of our hair, skin, and eyes is determined by the same thing: the amount of pigment they have. The pigment that causes dark hair, skin, and eyes is called melanin. Melanin is made in special cells in the body called melanocytes.
Blood needs to flow faster around the body in order to supply the muscles with oxygen for respiration
I believe it is A. Primary succession starts with plants and rocks.