How does the shape of our present day continents support the idea of continental drift?

1 answer:

5 0

Fossil records from separate continents, particularly on the outskirts of continents show the same species. As well mineral specimens along the supposed break lines of the continents are nearly identical. Some identical species exist on certain continents, like an earthworm common to both Africa and South America suggesting the species could not have spontaneously arisen on both continents without some variations.

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Describe the circumstances leading to desertification

Alja [10]

Answer:

Explanation:

Desertification:

The process of the land degradation in arid , semi - arid , and sub - humid areas because of the factors , human activities , climatic variations .

This process lead to persistent degradation of the dry land and ecosystem because of some variation in climate and man - made activities .

The major cause of Desertification are -

1. Overpopulation

2. Overgrazing

3. Deforestation