Which of the following is not a way that humus affects the properties of soil? a. Humus expands with increased moisture levels. b. Humus increases the movement of water and air in soil. c. Humus decreases the porosity of soil. d. Humus acts as the basis for soil life.

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.