Soils that have a blocky structure
A) are usually difficult to plow.
B) come apart in fragments that are taller than they are wide.
C) do not break apart into peds.
D) consist of grains that do not stick together.
A) are usually difficult to plow.
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In hyaluronic acid how is D-glucuronic acid linked to N-acetyl-D-glucosamine?
A) by an a(1 ? 3 ) glycosidic bond B) by an a(1 ? 4 ) glycosidic bond C) by a b(1 ? 3 ) glycosidic bond D) by a b(1 ? 4 ) glycosidic bond
In addition to the lymph nodes, where are lymphocytes formed?
A) the bone marrow B) the pancreas C) the kidneys D) the spleen
Why was corn an important crop in the Inland South during the 19th and early 20th century?
A) It was sold for export to countries with food shortages B) It was used as feed for draft animals that plowed the fields C) It was used to make distilled alcohol sold all over the United States D) It was used to make grits, a staple food.
The largest practical potential source of fresh water in the world is
A) soil moisture. B) lakes. C) groundwater. D) stream discharge. E) ice sheets and glaciers.