In a typical forest ecosystem, dead trees and fallen trees are most important because of their role in which of the following?
a. providing a valuable source of timber
b. providing habitats for wildlife
c. contributing to soil erosion
d. removing carbon dioxide from the air

5. how is transported soil different from residual soil? o a. it forms on unconsolidated materials. ob. it develops on bedrock. o c. it has been moved from another location. d. it transports other materials.

Select the correct text in the passage. the moving continents affect all subsystems on earth. which sentence identifies a potentially negative consequence of shifting continents? the supercontinent pangaea began to break up about 175 million years ago. [during this process, more coastline was exposed as the landmasses separated]. [the rearrangement and displacement of these huge landmasses resulted in the diversity of plants and animals we see on earth today]. [the movement of the plates sometimes leads to earthquakes and tsunamis]. however, over the long course of earth's history, their effects are usually minimal. in oceans, the plate movements usually lead to seafloor spreading. [seafloor spreading often results in the formation of underwater ranges of mountains].

How do oceanographers measure the salinity of ocean water?