A plant with a very extensive root system would be able to better absorb and store nutrients. True False. Solution Ans. True. Roots absorb water and inorganic minerals (nutrients like NH4+, phosphate, Ca2+, Zn2+, etc.). The rate of water and mineral uptake is directly proportional to the surface area of roots. So, as plants grow larger, they extend their roots for greater uptake of water and minerals. A plant with relatively smaller roots absorb water and nutrients less efficiently that the plant with extensive root system. The roots may also be involved in storage- greater is root surface area, greater is the storage..