Plant Pathology - Study Mode
[#786] Potassium is involved in
Correct Answer
(B) Promoting many enzymatic activities that regulate plant processes
Explanation
Solution: Potassium is involved in promoting many enzymatic activities that regulate plant processes. Potassium is associated with the movement of water, nutrients and carbohydrates in plant tissue. It is involved with enzyme activation within the plant, which affects protein, starch and adenosine triphosphate (ATP) production. The production of ATP can regulate the rate of photosynthesis.
[#787] If fertiliser prices go up the optimum close should
Correct Answer
(A) Come down
Explanation
Solution: If fertilizer prices go up the optimum close should come down. A fertilizer is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. The price of fertilizer has gone up and large-scale farms have begun to use less fertilizer. If large-scale farms keep reducing their use of fertilizer subsidies, they have no choice but to optimize the fertilizer they have which would therefore gain an increase in both grain yield and profit.
[#788] Sporopollenin is part of
Correct Answer
(A) Pollen grain covering
Explanation
Solution: Sporopollenin is part of Pollen grain covering. Sporopollenin is one of the most chemically inert biological polymers. It is a major component of the tough outer (exine) walls of plant spores and pollen grains. It is chemically very stable and is usually well preserved in soils and sediments.
[#789] Blackman's law was conceived in connection with
Correct Answer
(A) Photosynthesis
Explanation
Solution: Blackman's law was conceived in connection with Photosynthesis. The Blackman reaction is the name given to the rate-determining process. when photosynthesis is saturated with both light and carbon dioxide. Blackman theorized that at moderate light intensities, the "light" reaction limits or "paces" the entire process. In other words, at these intensities, the dark reaction is capable of handling all the intermediate substances produced by the light reaction.
[#790] Male gametophyte of angiosperms/monocots is
Correct Answer
(C) Microspore
Explanation
Solution: The male gametophyte of angiosperms/monocots is Microspore. Microspores are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes. The male gametophyte gives rise to sperm cells, which are used for fertilization of an egg cell to form a zygote. Microspores are haploid and are produced from diploid microsporocytes by meiosis. As the anther of a flowering plant (angiosperms) develops, four patches of tissue differentiate from the main mass of cells. These patches of tissue contain many diploid microsporocyte cells, each of which undergoes meiosis producing a quartet of microspores.