The human heart has to pump the average adult's 6.2 l of blood through the body every minute. the heart must do work to overcome frictional forces that resist the blood flow. the average blood pressure is 1.3×104 n/m2 .

Secondary succession would most likely be taking place in a(n)

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

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.