Plant Pathology - Study Mode

[#166] Nepoviruses are
Correct Answer

(B) Bipartite

Explanation

Solution: Nepoviruses are Bipartite. Nepovirus is a genus of viruses in the order Picornavirales, in the family Secoviridae, and the subfamily Comovirinae. Plants serve as natural hosts. There are 40 species in this genus. The genus Nepovirus includes viruses that are transmitted by nematodes with polyhedral particles. Typical nepoviruses have a broad host range, a single coat protein, and a bipartite single-stranded RNA genome and are transmissible through seed.

[#167] Milky water of green coconut is
Correct Answer

(C) Liquid endosperm

Explanation

Solution: The milky water of green coconut is a Liquid endosperm. Coconut Endosperm is the liquid endosperm of green coconuts Cocos nucifera. Coconut water is the clear liquid inside coconuts. In early development, it serves as a suspension for the endosperm of the coconut during the nuclear phase of development.

[#168] Who is regarded as the father of soil solarization?
Correct Answer

(A) Katan

Explanation

Solution: Katan is regarded as the father of soil solarization. Soil solarization is a hydrothermal process of disinfecting the soil of pests, accomplished by solar power and is relatively a new soil disinfestation method, first described in extensive scientific detail by Katan in 1976. It is a non-chemical environmentally friendly method for controlling pests using solar power to increase the soil temperature to levels at which many soil-borne plant pathogens will be killed or greatly weakened.

[#169] Mycoplasma cell membranes have how many layers
Correct Answer

(C) Three layers

Explanation

Solution: Mycoplasma cell membranes have Three layers. Mycoplasmas (class Mollicutes) are the smallest and simplest self-replicating bacteria. In Mycoplasma organisms the membrane seems to be composed of two electron-dense layers with a less dense layer in between this three-layered structure corresponds to the 'unit membrane' which covers cells and organelles of various origins.

[#170] The N in all fertilisers comes from
Correct Answer

(C) Air

Explanation

Solution: The N in all fertilizers comes from Air. For nitrogen-based fertilizers, the largest product group, the process starts by mixing nitrogen from the air with hydrogen from natural gas at high temperatures and pressure to create ammonia. The Haber process produces ammonia (NH 3 ) from methane (CH 4 ) (natural gas) gas and molecular nitrogen (N 2 ) from the air.