Nutrient enrichment of a lake will cause
eutrophication
stratification
biomagnification
bioaccumulation
A.
eutrophication
Eutrophication is an increase in the concentration of chemical nutrients in an ecosystem to an extent that increases the primary productivity of the ecosystem.
Stratification is a system or formation of layers, classes or categories. In ecology, it refers to the vertical layering of a habitat or the vertical arrangement of vegetation in layers.
Biomagnification is the increasing concentration of a substance, such as toxic chemical, in the tissues of tolerant organisms at successively higher levels in a food chain.
Bioaccumulation is the accumulation of substances such as pesticides or other chemicals is an organism.
Which of the following diseases is related to cadmium pollution?
Minamata
Pneumoconiosis
Anaemia
Itai- Itai
The true statement about 'green-house effect' is that it is caused by :
CO2 only
SO2 only
CO2 and SO2
CO2, CFC, CH4 and NO2 gases
Freon gas causing stratospheric O3 depletion is mainly released from
refrigerator
automobile
thermal power plant
steel industry
SO2 pollution is indicated by
Desmodium (grasses)
Sphagnum (mosses)
Usnea (lichens)
Cucurbita (climbers)
For a clean environment, which one following is not essential?
Producer
Consumer
Decomposer
Polluter
