Identify the landmark that is not part of the sphenoid bone.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

here is the answer

water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.