ecology & bio environment geography section 2 MCQ Questions & Answers Detailed Explanation

Answer: (c)

A National Park is an area that is strictly reserved for the welfare of wildlife and where activities such as forestry, grazing or cultivation are not allowed. Private ownership, rights and habitat, manipulation are not permitted in a national park.

There are 103 national parks in India covering an area of 40,500 km², which is 1.23% of the geographical area of the country.

Answer: (a)

An evergreen forest is a forest consisting entirely or mainly of evergreen trees that retain green foliage all year round.

Such forests reign in the equatorial region, between the tropics primarily as broadleaf evergreens, and in temperate and boreal latitudes primarily as coniferous evergreens.

Answer: (b)

Energy enters an ecosystem by being used to convert low-energy carbon dioxide into high-energy carbohydrate, then passes through one or more of the organisms of the community, and is then lost to the ecosystem.

Eventually, all of the energy that enters the ecosystem is lost in the form of heat.

Answer: (d)

An ecosystem is a community of living organisms (plants, animals and microbes) in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system. These components are regarded as linked together through nutrient cycles and energy flows.

Answer: (d)

A natural region is a basic geographic unit. Usually, it is a region that is distinguished by its common natural features of geography, geology and climate.

The surface of the Earth is divided into twelve natural regions. These regions have been categorized on the basis of surface features, climate and vegetation.

Answer: (d)

The biological methods of soil conservation include contour farming, strip cropping, tillage operation, mulching, etc. Contour farming is practised in hilly regions or on the slopes.

The contours (circular or peripheral furrows) catch the downwardly moving water until it is absorbed in the soil. It reduces runoff, saves more water for crops, and reduces soil erosion.