13. What is formed by a group of cells and tissues that work together to carry out a specific function?
a. organelle
b. organ
c. organ system
d. organism

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

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

Which types of seismic waves travel through earths interior? select all that apply. a) l waves b) p waves c) s waves