One benefit of the countercurrent flow process is
a. the blood is always passing water that has a higher oxygen content
b. the blood is always passing water that has a lower oxygen content
c. the blood and water reach equilibrium faster
d. the blood and water flow in the same direction

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

Defend or refute the argument that the government has too large a presence in the agriculture industry.

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials