Horticulture - Study Mode
[#866] Recommended level of Sodium benzoate for preservation of fruit juices is
Correct Answer
(D) 0.06 - 0.1%
Explanation
Solution: Recommended level of Sodium benzoate for the preservation of fruit juices is 0.06 - 0.1%. Sodium benzoate is a preservative added to some sodas, packaged foods, and personal care products to prolong shelf life. It’s an odorless, crystalline powder made by combining benzoic acid and sodium hydroxide. Benzoic acid is a good preservative on its own, and combining it with sodium hydroxide helps it dissolve in products. Sodium benzoate is a very common additive used in acid foods juices (pH lower than 4.5). It is safe for humans and its limit in fruit juices is 0.13%, varying from country to country.
[#867] Serpentine layering is followed in propagation of . . . . . . . .
Correct Answer
(B) Muscadine grapes
Explanation
Solution: Serpentine layering is followed in the propagation of Muscadine grapes . Serpentine layering is a method of layering which is used chiefly with woody vines and in which the stem to be propagated is laid on the ground and covered with earth at intervals to induce rooting of the buried sections which are later separated to form new plants. The texture of muscadines is softer and they taste sweeter than conventional supermarket grapes. These are used to make wine, juices, jellies, jams and sauces.
[#868] Carrot roots become longer
Correct Answer
(B) Below 10°C temperature
Explanation
Solution: Carrot roots become longer below 10°C temperature. The carrot is a root vegetable and biennial plant in the umbellifer family, Apiaceae. It grows a rosette of leaves while building up the enlarged taproot. The shape and size of carrot roots are influenced by soil type, temperature, etc. branching in carrots due to hereditary and the presence of under-composted organic matter or injury to the tap root system or check in heavy soil at a lower temperature.
[#869] Sporophytic Self-incompatibility is reported in
Correct Answer
(D) All of the above
Explanation
Solution: Sporophytic Self-incompatibility is reported in Beetroot, Radish and Brussels Sprout. Sporophytic self-incompatibility (SSI) is a self-pollen recognition system that enforces outcrossing in plants. It is a mechanism that prevents pollen from one flower from fertilizing other flowers of the same plant. Recognition in SSI systems is typically controlled by a complex locus (S-locus) with separate genes that determine pollen and stigma specificity.
[#870] Fern leaf disorder in potato is associated with deficiency of . . . . . . . .
Correct Answer
(C) Zn
Explanation
Solution: Fern leaf disorder in potatoes is associated with a deficiency of Zinc . Zinc deficiency symptoms of potatoes, also known as "fern leaf" or "little leaf", appear on young developing leaves as chlorosis, followed by the formation of narrow upwardly cupped leaf blades, often with tip burn. As the deficiency progress, these symptoms develop into intense interveinal necrosis but the main veins remain green, as in the symptoms of recovering iron deficiency.