Plant Pathology - Study Mode
[#506] The adjacent cells of the same fungal hypha brought into communication with each other by means of loops is known as
Correct Answer
(C) Clamp connection
Explanation
Solution: The adjacent cells of the same fungal hypha brought into communication with each other using loops are known as a Clamp connection. A clamp connection is a hook-like structure formed by growing hyphal cells of certain fungi. It is a characteristic feature of Basidiomycetes fungi. It is created to ensure that each cell or segment of hypha separated by septa receives a set of differing nuclei, which are obtained through the mating of hyphae of differing sexual types. It is used to maintain genetic variation within the hypha much like the mechanisms found in crozier (hook) during sexual reproduction.
[#507] Potassic fertiliser containing maximum quantity of potash is
Correct Answer
(A) Murate of potash
Explanation
Solution: Potassic fertilizer containing the maximum quantity of potash is a Muriate of potash. Muriate of potash (potassium chloride). It usually contains 60% K 2 O. It is the most common source of potash for farm use and is also the main potash ingredient for compound fertilizers containing potassium. Potash is essential for plant growth and quality. It plays a vital role in the production of proteins and sugars.
[#508] Translocation of carbohydrate nutrient usually occurs in the form of
Correct Answer
(D) Sucrose
Explanation
Solution: Translocation of carbohydrate nutrients usually occurs in the form of Sucrose. Translocation of carbohydrates and nutrients usually occurs in the form of sucrose through a sieve tube of phloem. Sucrose is transported from the source in the roots to the sinks in the leaves so they can restart growth. As the movement of sucrose can be in more than one direction, this movement is described as bidirectional. It allows for efficient energy transfer and increased energy storage.
[#509] Rate of transpiration is high in
Correct Answer
(A) C 3 plants
Explanation
Solution: Rate of transpiration is high in C 3 plants. C 3 plants lose up to 97% of the water taken up through their roots by transpiration. In dry areas, C 3 plants shut their stomata to reduce water loss, but this stops CO 2 from entering the leaves and therefore reduces the concentration of CO 2 in the leaves. Recent research has shown that many C 3 plant species have significant stomatal openings and transpire water at night even in desert habitats.
[#510] Two nutrients needed by plants in largest amounts are N and
Correct Answer
(A) Potassium
Explanation
Solution: Two nutrients needed by plants in largest amounts are N and Potassium. Elements used in large quantities by the plant are termed macronutrients, which can be further defined as primary or secondary. The primary nutrients include nitrogen (N), phosphorus (P) and potassium (K). Potassium is involved in the regulation of water and the transport of the plant’s reserve substances. It increases photosynthesis capacity, strengthens cell tissue, and activates the absorption of nitrates.