Which of the following is not a freshwater ecosystem?
a.
lakes
b.
rivers
c.
seas
d.
springs

The friction red blood cells encounter when moving past each other. cardiac output: the amount of friction blood encounters during flow through blood vessels. blood pressure: the force of the blood against the vessel wall. blood viscosity: the volume of blood pumped out by one ventricle each minute.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone