Agricultural Entomology - Study Mode

[#156] Cotton variety Abhadita is resistant to
Correct Answer

(C) Bollworm

Explanation

Solution: Cotton variety Abhadita is resistant to Bollworms. Bt cotton is a genetically modified pest resistant plant cotton variety, which produces an insecticide to combat bollworms. Bt toxins are insecticidal to the larvae of moths and butterflies, beetles, cotton bollworms and flies but are harmless to other forms of life. China first planted Bt cotton in 1997 specifically in response to an outbreak of cotton bollworm, Helicoverpa armigera, that farmers were struggling to control with conventional pesticides.

[#157] Transgenic crop which have highest area in world is
Correct Answer

(A) Soybean

Explanation

Solution: Transgenic crop which has highest area in world is Soybean. India has the world's fifth largest cultivated area under genetically modified (GM) crops, at 11.4 million hectares (mh) in 2017. In 2020, GMO soybeans made up 94% of all soybeans planted, GMO cotton made up 96% of all cotton planted, and 92% of corn planted was GMO corn. In 2013, GMO canola made up 95% of canola planted while GMO sugar beets made up 99.9% of all sugar beets harvested.

[#158] Nematode of industrial importance is
Correct Answer

(B) Turbatrix aceti

Explanation

Solution: Nematode of industrial importance is Turbatrix aceti. Turbatrix aceti (vinegar eels, vinegar nematode, Anguillula aceti) are free-living nematodes that feed on a microbial culture called mother of vinegar (used to create vinegar) and may be found in unfiltered vinegar. They were discovered by Pierre Borel in 1656. Manufacturers normally filter and pasteurize their product before bottling, destroying the live bacterial and yeast culture that these nematodes require for sustenance.

[#159] Which insect is used as 'Ecological indicator'?
Correct Answer

(C) Plecoptera

Explanation

Solution: Plecoptera insect is used as 'Ecological indicator'. Most insects like beetles, ants, honeybees, and butterflies are used as biological indicators in this study because they are sensitive to even a slight change in the environment and are also used in monitoring various pollutants in environment. All species of Plecoptera are intolerant of water pollution, and their presence in a stream or still water is usually an indicator of good or excellent water quality. Due to their nymph's requirement for well-oxygenated water, the species is very sensitive to water pollution. This makes them important indicators for water quality.

[#160] Secondary metabolites like antibiotics are not essential for
Correct Answer

(B) Log phase and exponential growth

Explanation

Solution: Secondary metabolites like antibiotics are not essential for Log phase and exponential growth. Microbial secondary metabolites, like antibiotics, pigments, growth hormones, antitumor agents, and others, are not essential for the growth and development of microorganisms, but they have shown great potential for human and animal health. Secondary metabolites serve as competitive weapons used against other bacteria, fungi, amoebae, plants, insects, and large animals. It serves as metal transporting agent and agent of symbiosis between microbes and plants, nematodes, insects, and higher animals also as sex hormones.