Why is it important to prevent soil erosion?

In a cladogram' when does a group of organisms branch off

What type of plant is good for a bioassay and where can i buy it? i only have a month.

The many stone tools, fragmentary animal bones, and teeth found at gran dolina, spain, indicate that hominids there? a. processed and consumed animals and other hominids. b. did not differ appreciably from earlier asian homo erectus. c. were similar to later homo sapiens. d. none of the above