Sound waves<span> coming from farther above, where it is warmer, will experience a refraction. The change in speed from the warmer </span>air<span> to the cooler </span>air<span> causes a bending effect, as the </span>sound travels<span> downward.</span>
Pyrite, Wulfenite, Pyromorphite, Topaz, Gypsum, and Feldspar.
Answer:
I would probably say (a) kinetochore microtubules
Biosphere. Bio means life, and Biosphere means ALL life on earth.