The natural growth rate of the United States population is about 1%. The 2010 census determined that the nation's population was about 309 million. Assuming the growth rate remains constant, approximately when is the US
population expected to reach 1 billion?
A) 2080
B) 2150
C 2240
D) 2700

Water changes bacteria in the soil converts this nutrient into a usable form. plants take up the usable nutrient through the soil and assimilate it into proteins, making it part of the plant. an animal eats the plants, and the nutrient becomes part of the animal. when the animal dies, it decomposes, returning the nutrient back to the soil. which cycle is being described? water cycle carbon cycle nitrogen cycle phosphorous cycle