ecology & bio environment geography section 1 MCQ Questions & Answers Detailed Explanation

Answer: (b)

The biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere. It is termed the zone of life on Earth.

Answer: (d)

Our ever-increasing addiction to electricity from coal-burning power plants releases enormous amounts of carbon dioxide into the atmosphere. 40% of U.S. CO2 emissions come from electricity production, and burning coal accounts for 93% of emissions from the electric utility industry.

Every day, more electric gadgets flood the market, and without widespread alternative energy sources, we are highly dependent on burning coal for our personal and commercial electrical supply.

Answer: (a)

Deciduous means “falling off at maturity” or “tending to fall off”, and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe.

In a more general sense, deciduous means the dropping of a part that is no longer needed or falling away after its purpose is finished.

Answer: (d)

During summer, the Bay of Bengal is subject to intense heating, giving rise to humid and unstable air masses that produce cyclones. Widespread death and property destruction are reported every year in exposed coastal states such as Andhra Pradesh and Odisha.

Although cyclones affect the entire coast of India, the East Coast is more prone compared to the West Coast. Out of the cyclones that develop in the Bay of Bengal, over 58 per cent approach and cross the east coast in October and November.

Only 25 per cent of the cyclones that develop over the Arabian Sea approach the west coast. In the pre-monsoon season, corresponding figures are 25 per cent over the Arabian Sea and 30 per cent over the Bay of Bengal.

Answer: (a)

Projections of future climate change suggest further global warming, sea-level rise, and an increase in the frequency and severity of some extreme weather events. Over the next several millennia, even if emissions were drastically reduced, global temperatures would remain close to their highest level for at least 1,000 years.

The coast will suffer severe impacts from sea-level rise.

Answer: (a)

The rubber plant grows wild in the equatorial regions of the world which are marked by rainfall of around 250 cm evenly distributed without any marked dry season and with at least 100 rainy days per year; temperature range of about 20°C to 34°C with a monthly mean of 25°C to 28°C; and high atmospheric humidity of around 80%.

The three largest producing countries, Thailand, Indonesia and Malaysia, together account for around 72% of all-natural rubber production.