2 Points
Which of these is an advantage of hydroelectric energy?
O
A. Is available in limited areas
O
B. Is a renewable energy source
O
C. Harms aquatic organisms
O
D. Is expensive to build or maintain

Which of the following typically characterizes a tropical rainforests

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

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?