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Question
The phenomenon of evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
The phenomenon of evolution of different species in a given geographical area starting from a point and spreading to other habitats is called:
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Solution
The correct option is D Adaptive radiation
The process of evolution of different species in a given geographical area starting from a common ancestor and radiating to other habitats, where the new environmental conditions brought about the suitable adaptation in the descendent population is called adaptive radiation.
Darwin’s finches which differ from each other on the basis of their beak shapes represent adaptive radiation as they originated from a common ancestor. The individual birds of that ancestral stock species had modified their beak shape based on the type of food resource available in their niche. Thus, this gave rise to different species of finches with different beak shapes, best adapted to feed on the available food like insects, seeds, etc.
A single step large mutation leading to speciation is called saltation.
The process of mutual evolutionary change that occurs between two species as they interact with one another is called co-evolution. Example: co-evolution of parasites and their hosts.
Natural selection is a process in which individuals which are physically, physiologically and behaviourally better adapted to a particular environment survive, reproduce and leave a greater number of progeny. The rest of those who couldn’t cope with the changing environments will perish.
The process of evolution of different species in a given geographical area starting from a common ancestor and radiating to other habitats, where the new environmental conditions brought about the suitable adaptation in the descendent population is called adaptive radiation.
Darwin’s finches which differ from each other on the basis of their beak shapes represent adaptive radiation as they originated from a common ancestor. The individual birds of that ancestral stock species had modified their beak shape based on the type of food resource available in their niche. Thus, this gave rise to different species of finches with different beak shapes, best adapted to feed on the available food like insects, seeds, etc.
A single step large mutation leading to speciation is called saltation.
The process of mutual evolutionary change that occurs between two species as they interact with one another is called co-evolution. Example: co-evolution of parasites and their hosts.
Natural selection is a process in which individuals which are physically, physiologically and behaviourally better adapted to a particular environment survive, reproduce and leave a greater number of progeny. The rest of those who couldn’t cope with the changing environments will perish.
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