Why did not natural selection leads to the evolution of such totally harmless parasites?

Explain Natural selection

Who named natural selection as suvival of the fittest?

Drawin's theory of natural selection explained evolution with respect to useful and useless modifications.

If the variation occur in population by chance alone and not by natural selection and bring change in frequencies of an allele. What is it called?

Draw a graph to show that natural selection leads to disruptive change.

Why did Mendel select pea plant for his experiments?

What is directional natural selection. Illustrate with suitable example.

Total stem parasite is…………. .

The theory of natural selection was proposed by _________.

Lamarsckism and Natural selection