DDT (Dichloro-diphenyl Trichloroethane) is a biocide. Biocides is the term that is broadly used to refer bactericides, fungicides, nematicides, insecticides, rodenticides and weedicides. A long term use of DDT can have favourable effect by resulting in complete eradication of the potential pests and invaders from an agricultural field. But the use of DDT for a long time has showed dangerous outcomes in the form of Biomagnification that resulted in tremendous decrease in bird population.
Explanation:
Biomagnification is defined as a gradual increase in concentration of a substance in successive trophic levels of a food chain.
Biomagnification of DDT interfered with the egg-shell formation and the thin shelled eggs broke at a premature stage. Thus , the bird population decreased significantly.
Answer:
Anticlines and Synclines. :)
Explanation:
Answer: The question is not well stated.
It should be choose the false statement from the options.
The correct answer is option C.
Fossils are not formed when organisms are preserved in recrystallized limestone called marble.
Explanation:
Fossils refers to remains of ancients organisms either plants or animals that have been preserved using a natural means. Fossils can be formed when of plants and animals and get buried during sedimentation or are buried by a lava flow or travel over gravel and leave imprints.
Examples of fossils include bone,shells, wood, coal,oil, DNA segment, objects preserved in Amber e.t.c.
They are use for historic studies, decorations , tourist attractions e.t.c.
Answer:
1st graph/diagram --> 2nd description (between top and bottom)
2nd graph/diagram --> 3rd description (bottom/last one)
3rd graph/diagram --> 1st description (top one)
