Answer:
Fe2+ atom has a larger size than Fe3+.
Explanation:
The electron transport chain is important for the production of the ATP molecule. The oxygen molecule acts as the final electron acceptor in the electron transport chain.
The size of the cation is always small as compared with the parental atoms. Two electrons are removed from Fe2+ and three electrons are removed from Fe3+. This removal of electron increases the attraction force between the electron of the outermost shell and the nucleus and decreases the repulsion force between the electrons and thus decreases in size.
Answer: d. migration away from productive growing areas
Explanation:
The rice, corn and wheat are the basic food crops. These crops are used for making several dishes their flour as well as the grains of rice and corn are eaten when cooked. These three crops are necessary to be grown on large scale to meet the basic food requirements of the large growing population worldwide. The plant roughage of these three crops can be used to make biofuels. These are used as a fodder crops to feed poultry and cattles for meat harvest.
The demand will also increase when one is migrated to an unproductive region. However, the increased demand is due to decreased supply and not because of increased consumption hence, it will not directly contribute to increase in demand of crops.
Answer;
Transport substances throughout an organism.
The cytoplasm in a single celled organism and the circulatory system in a human both transports substances throughout an organism.
Explanation;
Circulatory system carries blood to the cells of the body to distribute oxygen and nutrients and pick up cell wastes. It consists of the heart, blood vessels and the blood.
Cytoplasm in a single cell helps in the transport of materials such as nutrients, through out the cell.
