The ph of our blood is strictly maintained between 7.3 and 7.5 by a
a acid
b base
c proton
d buffer
e salt

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

Are the earth's ocean floor and continents the same age geologically? why or why not?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes