Plant Pathology - Study Mode
[#731] Dicliny is found in
Correct Answer
(B) Cucurbita
Explanation
Solution: Dicliny is found in Cucurbita. Dicliny is the cross-pollination in which the flowers are either staminate (male) or pistillate (female). Cucurbita is a genus of herbaceous fruits in the gourd family, Cucurbitaceae. Cross-pollination does occur readily within the family Cucurbitaceae.
[#732] The uredospores of Puccinia graminis are disseminated by
Correct Answer
(A) Wind
Explanation
Solution: The uredospores of Puccinia graminis are disseminated by Wind. The uredosorus develops on the wheat plant from the dikaryotic mycelium produced by germination of aeciospore, which comes from barberry plant generally through wind dissemination. They are dispersed by wind and germinate on leaf surfaces under humid conditions when the stomata are likely to be open.
[#733] Formation of embryo sac is
Correct Answer
(B) Megagametogenesis
Explanation
Solution: Formation of embryo sac is Megagametogenesis. Megagametogenesis is the process of maturation of the female gametophyte, or megagametophyte, in plants. During the process of megagametogenesis, the megaspore, which arises from megasporogenesis, develops into the embryo sac, which is where the female gamete is housed. These megaspores then develop into the haploid female gametophytes. This occurs within the ovule, which is housed inside the ovary.
[#734] The perfect stage of Blast of rice is
Correct Answer
(C) Magnaporthe
Explanation
Solution: The perfect stage of Blast of rice is Magnaporthe. The fungus that causes rice blasts is called Magnaporthe oryzae (formerly Magnaporthe grisea). It is an ascomycete because it produces sexual spores (ascospores) in structures called asci, and is classified in the newly erected family Magnaporthaceae.
[#735] Which is not an essential elements for plants?
Correct Answer
(D) Sodium
Explanation
Solution: Sodium is not an essential element for plants among the given options whereas all the other elements like Iron, Potassium, and Zinc are under 17 essential elements required for proper growth and development of plants. Sodium is not an essential element for plants but can be used in small quantities, similar to micronutrients, to aid in metabolism and synthesis of chlorophyll.