12. Which biome characterizes the American Plains, and Heartland for farming in the US?

Savanna
Boreal Forest
Temperate Grasslands
Chaparral

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2

Brainlest awardhow does smoking and arterial plaques increase the risk of hypertension? (2 points) select one: a. both increase blood volume. b. both decrease blood volume.c. both expand the diameter of the blood vessels. d. both constrict the diameter of the blood vessels.