Natural Vegetation and Habitats

Due to its relatively stable temperature, the most constant of the three types of habitat is ocean.

The Himalayan ranges show a succession of vegetation from the tropical to the tundra, which change in with the altitude.

This is the correct answer as ebony, mahogany, rosewood, rubber and cincona are found in the tropical evergreen forests.

This is the correct answer as mulberry trees are not found in arid areas, but are found in dry deciduous areas.

This is the correct answer. Tropical evergreen forests are found in areas of heavy rainfall with a short dry period. These forests are found in areas that are warm and wet. Andaman and Nicobar Islands and western slopes of Western Ghats are the areas in which such forests are found.

This is the correct answer. The mangroves are tidal swamps where the roots of trees are submerged. Mostly, the sundari trees are found here. These trees provide durable hard timber. Palm, coconut, keora and agar can also be found in some places of mangrove tidal forests.

This is the correct answer as temperate forests containing coniferous trees like pine, deodar, silver fir, spruce and cedar can be found in southern slopes of the Himalayas and places having high altitude in southern and North-East India.

This is the correct answer. Nomadic tribes like the Gujjars and the Bakarwals use alpine grasslands for grazing their livestock. This area approaches the snow line and is high in altitude with stunted growth of trees.

This is the correct answer as teak is the most dominant species found in moist deciduous forests.

Tropical regions support a wide variety of plants and animals because of the continuous warmth and rainfall in these regions.

Annual rings are well marked in trees growing in temperate regions.

The forests in peninsular India are predominantly tropical deciduous type, which shed their leaves during the dry season to conserve water. The region's climate with distinct wet and dry seasons favors deciduous species over evergreen or coniferous varieties.

Tropical grasslands are known by different names in different parts of the world. In Africa, the tropical grasslands are called 'savannas' - characterized by scattered trees and a continuous grass layer, supporting diverse wildlife like zebras, elephants, and lions. Options A, C, and D are incorrect because: 'steppes' are temperate grasslands found in Eurasia (like in Central Asia and Eastern Europe), 'pampas' are the fertile grasslands of South America (mainly Argentina), and 'downs' refer to grassland hills in southeastern England. Thus, 'Savannas' is the correct answer as it is the specific term for African tropical grasslands.

Prairies are temperate grasslands characterized by long treeless grassy plains. While campos (Brazil), llanos (Colombia/Venezuela), and pampas (Argentina) are also grasslands, prairies specifically refer to the temperate grasslands of North America.

The Sundarbans (Sunderban) is a tidal forest, specifically mangrove forests, located in the delta region of the Ganges, Brahmaputra, and Meghna rivers. The term 'tidal forest' refers to forests that are regularly flooded by tidal waters, which is characteristic of mangrove ecosystems.