Explain how the nephron maintains normal body fluid with respect to each of the following:

a) water
b) ions
c) ph

What is the difference between an igneous, sedimentary and metamorphic rock

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.