Plant Pathology - Study Mode

[#946] Malathion is present is
Correct Answer

(D) Finit/Flit

Explanation

Solution: Malathion is present in Finit/Flit. Malathion is an organophosphate insecticide that acts as an acetylcholinesterase inhibitor.
Malathion is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito eradication. Malathion is produced by the addition of dimethyl dithiophosphoric acid to diethyl maleate or diethyl fumarate. The compound is chiral but is used as a racemate.

[#947] What did J. H. Cragie study?
Correct Answer

(C) Sex in rust fungi

Explanation

Solution: J. H. Cragie studied Sex in rust fungi. John Hubert Craigie was a Canadian plant pathologist. He is known for his "research and development of rust-resistant cereals which have been of vital significance to Canada as a cereal producing nation. In 1930, he received a Ph.D. from the University of Manitoba. In 1926, he published "Discovery of the Function of the Pycnia of the Rust Fungi.

[#948] Cells absorb water through
Correct Answer

(C) Both A and B

Explanation

Solution: Cells absorb water through Osmosis and Imbibition only. Both phenomena help in the metabolic activity of the plant. The process of adsorption of water by solid particles of a substance without forming a solution is called imbibition. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. Water moves into and out of cells by osmosis.

[#949] Parasexuality was 1 st reported in
Correct Answer

(A) Aspergillus nidulans

Explanation

Solution: Parasexuality was 1 st reported in Aspergillus nidulans. The parasexual cycle, a process restricted to fungi and single-celled organisms, is a ccnonsexual mechanism of parasexuality for transferring genetic material without meiosis or the development of sexual structures. It was first described by Italian geneticist Guido Pontecorvo in 1956 during studies on Aspergillus nidulans. A parasexual cycle is initiated by the fusion of hyphae during which nuclei and other cytoplasmic components occupy the same cell.

[#950] Apparatus to measure rate of respiration and R.Q. is
Correct Answer

(C) Respirometer

Explanation

Solution: Apparatus to measure the rate of respiration and R.Q. is Respirometer. A respirometer is a device used to measure the rate of respiration of a living organism by measuring its rate of exchange of oxygen and/or carbon dioxide. Respirometers are used primarily to perform intermittent measurements of tidal and minute volume and are most widely used to assess that mechanical ventilators are delivering an appropriate volume of gas.