Plant Pathology - Study Mode
[#636] Which of the following fertiliser is not produced in India?
Correct Answer
(D) Murate of potash
Explanation
Solution: Muriate of potash fertilizer is not produced in India. Muriate of Potash (MOP) is a fertilizer supplying Potassium, which is one of the major plant nutrients. India does not have any commercially viable source of potash, the entire requirement of potassic fertilizers is met through importation from foreign countries.
[#637] Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as
Correct Answer
(B) Glycolysis
Explanation
Solution: The incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as Glycolysis. Glycolysis is the metabolic pathway that converts glucose (C 6 H 12 O 6 ) into pyruvate (CH 3 COCO 2 H). It does not require oxygen (In anaerobic conditions pyruvate is converted to lactic acid). The free energy released in this process is used to form the high-energy molecules adenosine triphosphate (ATP) and reduced nicotinamide adenine dinucleotide (NADH). Glycolysis is a sequence of ten reactions catalyzed by enzymes.
[#638] Urea hydrolysis in the soil produces
Correct Answer
(C) Ammonium carbonate
Explanation
Solution: Urea hydrolysis in the soil produces Ammonium carbonate. The hydrolysis of urea occurs in two stages. In the first stage, ammonia and carbamic acid are produced. The carbamate spontaneously and rapidly hydrolyzes to ammonia and carbonic acid, and produces Ammonium carbonate. Urea applied to the soil reacts with water and the soil enzyme urease and is rapidly converted to ammonium. In this reaction, hydrogen ions (H + ) are consumed, causing the soil pH near the fertilizer to rise.
[#639] Parthenogenesis is
Correct Answer
(D) Development of embryo from egg without fertilization
Explanation
Solution: Parthenogenesis is the Development of the embryo from egg without fertilization. Parthenogenesis is a natural form of asexual reproduction in which the growth and development of embryos occur in a gamete (egg or sperm) without combining with another gamete. Parthenogenesis means the development of an embryo from an unfertilized egg cell. Mature egg cells are produced by mitotic divisions, and these cells directly develop into embryos. In flowering plants, cells of the gametophyte can undergo this process.
[#640] Cleistogamous flowers are found in
Correct Answer
(A) Arachis hypogea
Explanation
Solution: Cleistogamous flowers are found in Arachis hypogea. Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers. The principal advantage of cleistogamy is that it requires fewer plant resources to produce seeds than does chasmogamy because the development of petals, nectar and large amounts of pollen is not required.