Natural Vegetation and Habitats

CAZRI (Central Arid Zone Research Institute) located in Jodhpur, Rajasthan, is the premier research institute in India dedicated to studying desert flora, fauna, and ecosystem management in arid regions.

A desert is defined by being arid (extremely dry) - this is the characteristic that makes a desert a desert. While many deserts do have cacti and flat landscapes, these are not universal or defining features. Some deserts have rocky terrain or mountains, and not all have cacti. An oasis is actually an exception within a desert - a water source, not the defining feature. 'Arid' is the necessary condition.

The passage mentions that Arctic Tundra has only meagre vegetation (dwarf trees are mentioned in the vegetation of alpine tundra). The passage also mentions that most animals with names starting with 'snowy', 'arctic' and 'polar' can be found in the Arctic.

It is the ecological behaviour in which the animals inhabit the trees.

 Alpine meadows are seen where sediments from the weathering of rocks have produced soils, which are developed enough to support plants like grasses and sedges.

This is the correct option. Cactus trees are not found in a forest. They are found mainly in a desert.

Natural regions are geographical areas defined by the presence of similar physical (natural) characteristics. Landforms, rock structure, drainage patterns, climate, natural vegetation, and soil types are all physical/natural features that form the basis for classifying natural regions. Cultural, social, and economic regions are defined by human activities and characteristics.

Eucalyptus trees are found along sewage ponds

Extensive Aw or tropical wet and dry climate is found to the north and south of the Amazon forest in Brazil. This is the correct answer.

The tundra climate (ET) is  named after the types of vegetation, like low growing mosses, lichens and flowering plants.

This is the correct matching. BSh indicates the Subtropical steppe type of climate and this has sparse grasslands. Aw indicates Tropical wet and dry climates and these have deciduous forests, and tree shredded grasslands. Af indicates the Tropical wet climates and these have tropical evergreen forests with a dense canopy cover and large biodiversity.

Deserts host animals and plants living in what strikes many human as hostile environments. In  eco systems many plants compete for sunlight  but in deserts,  plants are adapted to shorten the effects of too much solar energy. The plants life cycles goes dormant as the desert conditions become unfavourable with time, making some plants to quickly germinate, renew and flower their species before annual moisture dries up.

Greenhouses are structures designed to trap heat from the sun, keeping plants warm during cold seasons. They work by allowing sunlight in but preventing heat from escaping, similar to the atmospheric greenhouse effect. Nurseries, gardens, and orchards are locations or plant collections, not structures that trap heat.

Tropical grasslands are correctly called savannas. While the spelling in option C has a minor typo ('Savanah' instead of 'Savanna'), this is still the correct answer among the choices. Pampas are temperate grasslands in South America, Llanos (not 'Llanas') are tropical grasslands but more specific to Colombia/Venezuela, and Veld refers to temperate grasslands in South Africa.

India's rainforests are primarily concentrated in two regions: the Northeast Himalayas (Assam, Meghalaya, Tripura) and the Western Ghats (Kerala, Karnataka, Tamil Nadu). These areas receive very high rainfall (over 2500mm annually) and support tropical evergreen forests. Central India, Eastern Ghats, and Northwest Himalayas have different vegetation types due to lower rainfall.