Plant Pathology - Study Mode
[#706] Which of the following is least effective in photosynthesis
Correct Answer
(D) Green light
Explanation
Solution: Green light is the least effective in photosynthesis. Chlorophyll gives plants their green colour because it does not absorb the green wavelengths of white light. That particular light wavelength is reflected from the plant, so it appears green. Plants that use photosynthesis to make their food are called autotrophs.
[#707] The least hygroscopic fertiliser is
Correct Answer
(C) SSP
Explanation
Solution: The least hygroscopic fertilizer is SSP. SSP is the most popular phosphatic fertilizer after DAP as it contains 3 major plant nutrients i.e. Phosphorus, Sulphur and Calcium along with traces of other micronutrients. SSP is a grey to brownish coloured material containing monocalcium phosphate and calcium in almost equal proportions. It is the least hygroscopic but needs moisture-proof packing to avoid lump formation during storage.
[#708] Feathery stigma occurs in
Correct Answer
(B) Wheat/Jowar
Explanation
Solution: Feathery stigma occurs in Wheat/Jowar. The stigmas are long and feathery, which gives a large surface area for catching pollen. Feather stigmas are generally found in the Poaceae family and wheat is one of the representatives of this family. Wheat has feathery stigmas because it is wind-pollinated and feathery stigmas are necessary for capturing the pollen grains.
[#709] Photosynthesis occurs in
Correct Answer
(D) Chloroplasts
Explanation
Solution: Photosynthesis occurs in Chloroplasts. In plants and algae, which developed much later, photosynthesis occurs in a specialized intracellular organelle the chloroplast. Chloroplasts perform photosynthesis during the daylight hours. The immediate products of photosynthesis, NADPH and ATP, are used by the photosynthetic cells to produce many organic molecules.
[#710] The mordant used in Gram staining is
Correct Answer
(C) Iodine
Explanation
Solution: The mordant used in Gram staining is Iodine. The mordant is Gram's Iodine. This binds to the crystal violet making a large complex that adheres to the cell membrane. Gram's Iodine is allowed to sit for 30 seconds then the decolourizer, 95% ethanol is added.