Soil erosion which is also called the 'creeping death of the soil' is a global problem (Tripathi and Singh, 1993). India is facing soil erosion problems in sectors such as reservoir siltation, soil-degradation and in agricultural sectors mainly.

It is the number of species unique to each environment that is used to calculate species diversity between two nearby ecosystems. Considering the above slope example, the species diversity between any two patches and their communities in that particular slope represents beta diversity.

The giant panda is the featured animal on the logo for World Wildlife Fund as a symbol of all endangered species that would be able to thrive if permitted the range and natural environment of their origin. Our logo is representative of World Wildlife Fund's commitment to protect wildlife and wild spaces.

Explanation: Roots are the underground structures that help in the absorption of water and minerals, provide a proper anchorage to the plant parts, store reserve food material (Carrot, Radish), and synthesize PGR (plant growth regulators). Sometimes roots get modified to perform different functions like Storage of food, respiration, climbing, etc. These types of roots are called modified roots. Examples - prop root of the Banyan tree for providing support, Pneumatophores of Rhizophora, and Mangrove plants for respiration. So, these statements are correct. A. To give support to the plant. C. To store food. D. To absorb water and minerals.

Final answer: In our country, vast tracts of forests are cleared and a single species of plant is cultivated. This practice promotes monoculture in the area.

Potatoes are modified underground stems. They have portions called 'eyes' that can give rise to new plants.

The correct answer is Bristlecone pines. Bristlecone pines are the oldest non-clonal species on the planet.