The decayed organic material that gives soil its dark brown or black color is called
a) clay.
b) humus.
c) loam.
d) silt.

Classify the descriptions and examples as endocrine or neural control

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

What changes the stability of the element