Life in Tropical and Subtropical Region

The Polar Region is characterised by dense evergreen forests known as the 'selvas'.

The basin of the Amazon River of South America falls within tropical region.

The region extending between ${10}^0$north and ${10}^0$ south of Equator is known as Equatorial Region.

The tropical and sub-tropical regions of the world extend from the equator to ${30}^0$ north and ${30}^0$ south.

Cotyledons are also called-