Plant Pathology - Study Mode
[#241] Night soil contains
Correct Answer
(D) 5.5% N
Explanation
Solution: Night soil contains 5.5% N. Night soil is nothing but Human excreta, collected from cesspools, privies, pail closets, pit latrines, and septic tanks. It was produced as a result of a sanitation system in areas without sewer systems or septic tanks and sold as a fertilizer. Night soil is very rich in essential plant nutrients. It contains about 5.5% Nitrogen, along with other compounds like phosphorus, potassium, etc.
[#242] For synthesis of a molecule of glucose, the requirement of ATP and NADPH is respectively
Correct Answer
(D) 18 and 12
Explanation
Solution: For the synthesis of a molecule of glucose, the requirement of ATP and NADPH is 18 and 12 respectively. The Calvin cycle uses the chemical energy of ATP and the reducing power of NADPH from the light-dependent reactions to produce sugars for the plant to use. These substrates are used in a series of reduction-oxidation reactions to produce glucose. The reactions for the formation of a molecule of glucose take the products (18ATP and 12 NADPH) of light-dependent reactions.
[#243] Force-runner of male gamete is
Correct Answer
(C) Microspore mother cell
Explanation
Solution: The fore-runner of the male gamete is the Microspore mother cell. Microspores are land plant spores that develop into male gametophytes, that is pollen in plants. 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.
[#244] C 4 cycle was discovered in
Correct Answer
(B) Sugarcane
Explanation
Solution: The C 4 cycle was discovered in Sugarcane. C 4 carbon fixation is one of three known photosynthetic processes of carbon fixation in plants. It owes the name to the 1960's discovery by Marshall Davidson Hatch and Charles Roger Slack in a sugarcane plant that refers when supplied with 14 CO 2 , incorporates the 14 C label into four-carbon molecules first.
[#245] Genotypically the pollen grains produced by an anthers belong to
Correct Answer
(C) Many types
Explanation
Solution: Genotypically the pollen grains produced by anthers belong to many types. Several types of pollen grains are formed by anthers in plants. The anther usually contains four pollen sacs which are responsible for producing pollen grains. Pollen grains emerge from sporogenous tissues within the anther. Each sporogenous tissue cell inside the anther can produce pollen grains.