This is a preview. Log in through your library . Abstract Nodule nitrogen fixation rates are regulated by a mechanism which is responsive to the rhizosphere oxygen concentration. In some legumes, this ...

This is a preview. Log in through your library . Abstract Analyses have been made, with respect to the principal inorganic constituents, of the blood and urine of Carcinus, when living in normal sea ...

Diffusion is the net movement of molecules from an area where they are at a higher concentration to areas where they are at a lower concentration. This is due to the random movement of the molecules.