Due to decreased light penetration, which area of rivers and streams will have less diversity of plant life?
a. the source
b. the mouth
c. the middle portion
d. none of the above

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?

What geologic process is related to caldera formation?