Environmental Science In Agricultural - Study Mode
[#191] DDT is banned because
Correct Answer
(B) Long persistence in the environment
Explanation
Solution: DDT is banned because long persistence in the environment. Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochloride. DDT is similar in structure to the insecticide methoxychlor and the acaricide dicofol. DDT became a prime target of the growing anti-chemical and anti-pesticide movements, and in 1967 a group of scientists and lawyers founded Environmental Defense with the specific goal of enacting a ban on DDT.
[#192] Animal species should be protected because they are
Correct Answer
(D) Man cannot recreate a lost species
Explanation
Solution: Animal species should be protected because they are Man cannot recreate a lost species. Animals and plants aren't just valuable for their own sake, they're also part of a wider natural environment that may provide food, shelter, water, and other functions, for other wildlife and people.
[#193] Natural water that exposed to limestone is
Correct Answer
(A) Calcareous water
Explanation
Solution: Natural water that is exposed to limestone is Calcareous water. When water percolates through deposits of limestone, chalk or gypsum, which are largely made up of calcium and magnesium carbonates, bicarbonates, and sulphates, then that water is termed calcareous water. It is not a health risk but is a nuisance because of mineral buildup on plumbing fixtures' and poor soap and or detergent performance.
[#194] Soil particle determine its
Correct Answer
(A) Texture
Explanation
Solution: Soil particles determine its Texture. Soil texture (such as loam, sandy loam or clay) refers to the proportion of sand, silt and clay-sized particles that make up the mineral fraction of the soil. The texture of a soil determines soil water-holding capacity, permeability and soil workability. Sand, silt, clay and organic matter particles in a soil combine to form larger particles. Soil structure is the arrangement of the soil particles into aggregates of various sizes and shapes.
[#195] The most important cause for the loss of biodiversity is
Correct Answer
(A) Climate change
Explanation
Solution: The most important cause of the loss of biodiversity is Climate change. Climate change is one of the main drivers of biodiversity loss, but destruction of ecosystems undermines nature's ability to regulate greenhouse gas (GHG) emissions and protect against extreme weather, thus accelerating climate change and increasing vulnerability to it. Loss of biodiversity can lead to land degradation, effects on water supply and changes in farming productivity.