ecology & bio environment geography section 2 Practice Questions Answers Test with Solutions & More Shortcuts

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.

They are biological system in the sense that they represent recurring groups of biological communities that are found in similar physical environments and are influenced by similar dynamic ecological processes, such as fire or flooding.

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.

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)

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: (a)

El Nino Modiki is associated with global warming.