While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment

(b) Darwin is the correct option.

Reduce means to use a material/commodity in lesser quantity, e.g electricity and water Recycle means a material that is used once is collected and sent back to a manufacturer so that they...

A = {x: x is a natural number} = {1, 2, 3, 4, 5 …}  B ={x: x is an even natural number} = {2, 4, 6, 8 …}  C = {x:...

Creation and variation occur in a sexually reproducing population as a result of crossing over during meiosis and random fusion of gametes. It is however the organisms that are selected over a...

Migration can enhance the process of natural selection by bringing in the alleles and traits within a population that are selected by nature. Hence, providing advantage to a particular group. Migration can...

(a) The process by which new species develop from the existing species is known as speciation. The factors which could lead to speciation are (i) Geographical isolation of population caused by...

Pests have (built in) variations in terms of their ability to survive in a given environment, a change in the environment, in the form of an antibiotic would bring out...

Fitness refers to reproductive fitness (will leave more progeny) - more survival and hence selected by nature - natural selection 

dark winged moth where as it reversed in the post industrialised period  In Pre industrialised period the tree trunks were covered with white coloured thick growth of lichens hence the...

The correct answer is (1)  Artificial selection to obtain cow yielding higher milk output will shift the peak to one direction, so this represents an example of Directional selection. In stabilizing...