Environmental Science In Agricultural MCQ Question and Answer | Agriculture MCQ Question

Sulphur dioxide affects all membrane systems.
Sulphur dioxide is the chemical compound with the formula SO₂. It is a toxic gas responsible for the odour of burnt matches.
Sulphur dioxide irritates the skin and mucous membranes of the eyes, nose, throat, and lungs. High concentrations of SO₂ can cause inflammation and irritation of the respiratory system, especially during heavy physical activity.

Amount of nitrogen fixed by nitrogen fixing organisms per year is about 175 million tonnes.
Biological fixation of the atmospheric nitrogen can be estimated at 175 million metric tons per year or about 70% of all nitrogen fixed on the Earth per year, the remaining is by some micro-organisms, autotrophs or heterotrophs 'free' fixers.

Ozone day is celebrated on 16^th September.
In 1994, the United Nations General Assembly proclaimed 16^th September the International Day for the Preservation of the Ozone Layer.
World Ozone Day is celebrated every year to spread awareness among people about the depletion of Ozone Layer and the measures taken and to be taken to preserve it.

Ecological cycling of Lead is not assisted by microorganisms.
The lead cycle is the biogeochemical cycle of lead through the atmosphere, lithosphere, biosphere, and hydrosphere, which has been influenced by anthropogenic activities.
Anthropogenic activities have accelerated lead mobilization to the environment. The majority of anthropogenic lead comes from non-ferrous metal manufacturing plants, mining and smelting of ores, stationary and mobile fossil fuel combustion platforms, and lead batteries.

In recent years, there has been an increasing incidence of floods in Northern India because there has been increased deforestation in the catchment areas.
Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use.
Deforestation causes increases in temperatures and changes in the amount and distribution of rainfall generally creating a drier climate. These impacts can affect soil moisture, reducing yields in some areas and increasing flooding in others.

Silent valley (Kerala) is preserved because it contains very rare species of plants and animals.
Silent Valley National Park is a beautiful representation of the last remaining rain forest of Kerala. It is located in the Nilgiri hills and has a core area of 89.52 km². It is surrounded by a buffer zone of 148 km².
This national park has some rare species of flora and fauna. Silent Valley National Park was explored in 1847 by the botanist Robert Wight.

Hydrological cycle is under the control of Forests and sunlight.
Hydrological cycle is a biogeochemical cycle that describes the continuous movement of water on, above and below the surface of the Earth.
The level and flow of water depends on the forest cover also the sunlight which evaporates water from the surface.

Cadmium pollution is associated with disease Itai-itai.
Itai-itai disease is caused by cadmium (Cd) exposure, produced as a result of human activities related to industrialization, and this condition was first recognized in Japan in the 1960s.
Itai-itai disease is characterized by osteomalaecia with severe bone pain and is associated with renal tubular dysfunction.

Plants die in water-logged soils due to Stoppage of root respiration.
Waterlogging is excess water in the root zone accompanied by anaerobic conditions. The excess water inhibits gaseous exchange with the atmosphere, and biological activity uses up available oxygen in the soil air and water also called anaerobiosis, anoxia or oxygen deficiency, because of which roots cannot respire causing death of the plant.

Air pollution is maximum in automobile exhausts and chemicals from industries.
Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or materials.
Aerosols are produced by human activities such as the combustion of fossil fuels in automobiles, power plants, and numerous industrial processes. Potential contributors to such an outcome include increased burning activities, traffic, agri-food and chemical industries.