The "well-field system" Select one: a. was an animistic belief designed to protect the health of the land. b. was originally developed by Aryan invaders to improve agricultural productivity in western China. c. was the first major agricultural advance in ancient China. d. was a water-diversion system which insured that every farm had the amount of water it needed. e. allowed peasants plots cultivated for their own use as well as land cultivated for their lords.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

answer: b

coz red blood cells marrow and circulates the body for 120 days.

propane is burned to provide the heat in many cooking grills. the chemical reaction for this process is shown in the equation below.

c3h8 + 5o2 ? 3 co2 + 4h2o + energy

what are the products in this chemical reaction?

3co2 + 4h2o + energy