Biology GK Questions Quiz-68

1341.Azolla increases soil fertility for (1) maize cultivation (2) wheat cultivation (3) barley cultivation (4) rice cultivation Answer: 1341.(4) The nitrogen-fixing capability of Azolla has led to it being widely used as a biofertiliser for increasing the productivity of rice fields. When rice paddies are flooded in the spring, they can be inoculated with Azolla, which then quickly multiplies to cover the water, suppressing weeds. The rotting plant material releases nitrogen to the rice plants, increasing the rice yield equivalent to that produced by 30-60 kg N/ha. 1342.Which of the following is responsible for transport of food and other substances in plants ? (1) Xylem  (2) Phloem (3) Chloroplast  (4) None of these Answer: 1342.(2) The transport of water, nutrients and other substances from one part of a plant to another is called translocation. While, phloem transports synthesized food from the leaves to the rest of the plant body; water and minerals are transported from the roots upwards thro…