Plant Pathology - Study Mode

[#546] Which group of fungi have single posterior flagella?
Correct Answer

(D) Chytridiomycetes

Explanation

Solution: Chytridiomycetes fungi have single posterior flagella. Chytridiomycetes is the major class of the phylum Chytridiomycota, which contains several parasitic species. A common characteristic of chytrid fungi is that they propel themselves with a single posterior flagellum.

[#547] Photosynthesis is a process in which
Correct Answer

(D) CO 2 is reduced

Explanation

Solution: Photosynthesis is a process in which CO 2 is reduced. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy, through cellular respiration. Photosynthesis occurs in two stages. In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the hydrogen carrier NADPH and the energy-storage molecule ATP. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.

[#548] Six kingdoms system was given by
Correct Answer

(C) Carl Woese

Explanation

Solution: The six kingdoms system was given by Carl Woese. Six Kingdoms is a scheme of classifying organisms into six kingdoms, It is Proposed by Carl Woese. It comprises 3 domains - Archae, Bacteria, and Eukarya. These domains are further classified into kingdoms - Archaebacteria, Eubacteria, Protista, Fungi, Plantae and Animalia.

[#549] The C 4 -plants are different from the C 3 -plants with reference to the
Correct Answer

(A) The substance that accepts CO 2 in carbon assimilation

Explanation

Solution: The C 4 plants are different from the C 3 plants with reference to the substance that accepts CO 2 in carbon assimilation. In C 4 plants, CO 2 is assimilated by condensing with PEP, with the help of the PEPCase enzyme to yield the first stable product, four carbon compound OAA. Whereas In the C 3 plants, CO 2 is assimilated by condensing with RuBP with the help of RuBisCO enzyme to yield the first stable product, the three-carbon compound PGA.

[#550] Bitter rot of apple is caused by
Correct Answer

(A) Colletotrichum gloeosporoides

Explanation

Solution: The bitter rot of apples is caused by Colletotrichum gloeosporoides. Bitter rot on apple and pear fruit is caused by the pathogenic fungi in the Colletrotrichum genus, specifically those species in the C. acutatum and C. gleosporioides species complexes. It is identified by sunken circular lesions with conical intrusions into the apple flesh that appear V-shaped when the apple is cut in half through the center of the lesion. It is one of the most devastating diseases of apple fruit in regions with warm wet weather.