Question

Camels and llamas are examples of dispersed individuals evolving separately. This is considered as a consequence of

• A. Ecological barriers
• B. Climatic barriers
• C. Continental drift
• D. Topographical factors

Answer 1

The correct option is D Topographical factors

Population dispersion can be defined as the spatial distribution of individual on the basis of favourable conditions available for their survival. Some of the regions are densely populated while the others are scarcely populated. The densely populated area has favourable conditions while the scarcely populated has tough climatic conditions for survival. Camels and llamas are examples of dispersed individuals evolving separately. This is considered as a consequence of topographical factors.

Topography: It is the description of the physical features of a place.

It describes configuration of the ground, its altitude, slope, aspect, etc.

affects vegetation through climate, soil formation processes, soil moisture, soil nutrients, etc.

Topographic Factors can be classified into:

1. Configuration of land surface
   
2. Altitude
   
3. Slope
   
4. Aspect and exposure
   

Camels live in Africa and Asia. Camels can live in dry lands where there is little feed and water available. Most are one-humped but in northern areas where there are cold, dry lands two-humped camels are found.

Camels are used for meat, milk, fibre (wool and hair), for transport and for other work and their dung is used for fires. Camels provide everything in a desert environment.

Llamas and alpacas are small camel-like animals from the cold, dry mountain areas of South America. They are used for meat and wool. The llamas are also used as pack animals (to carry loads)