Fungal hyphae have an important influence on soil structure because they one:
a. create large channels that enhance water flow and aeration
b. stabilize macro aggregates
c. to flocculate the soil colloids
d. are active in the formation of soils crusts
e. all of the above

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.

Which barrier to economic development is shown in the following examples?

What is the largest river in the united states?