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

Answer: (d)

Soil, water and climate of a region are the three primary factors significantly influencing the vegetation of a region. Such factors as depth, texture, and humus content of the soil determine the type of vegetation that can be supported in a region.

Again, any vegetation needs moisture to survive and this explains the range which varies from evergreen forests to shrubs.

Temperature also plays a crucial role in plant growth and development with extremes on either end affecting plant growth severely.

Answer: (a)

In paleo-geography, Gondwana, originally Gondwanaland, was the southernmost of two supercontinents that were part of the Pangaea supercontinent. It existed from approximately 510 to 180 million years ago.

It included most of the landmasses in today's Southern Hemisphere, including Antarctica, South America, Africa, Madagascar and the Australian continent, as well as the Arabian Peninsula and the Indian subcontinent, which have now moved entirely into the Northern Hemisphere.

Answer: (d)

Mercury causes biomagnification problem in the ecosystem.

Answer: (c)

Biome is a large naturally occurring community of flora and fauna adapted to the particular conditions in which they occur. For example, Tundra region.

Answer: (c)

Polar climates feature long and dark winter periods with extremely cold temperatures. Rainfall is low, and the deeper soil layers stay frozen all year round.

These harsh conditions combined result in treeless, sparse vegetation, which includes shrubs, lichens and mosses, during the summer months. This typical vegetation linked to polar climates is called tundra.