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?

Why variations occur in population ?

Why variations are occurs in population?

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

In a certain population, the frequency of three genotypes is an follows. What is the likely frequency of B and b alleles?

What is natural frequency of oscillation of a system?

In a certain population, the frequency of three genotypes is as follows: What is the likely frequency of alleles 'B' and 'b'?

What is artificial selection? Do you think it affects the process of natural selection? How?

A student performed following two activities in school laboratory: Activity 1: Addition of zinc dust into copper sulphate solution taken in a test tube. Activity 2: Addition of an iron nail into copper sulphate solution taken in a test tube. He noted down his observations and concluded that chemical reaction occurs in both the cases based on the observed colour change of the resulting solution. What is the final colour of the solution in Activity 1

A student performed following two activities in school laboratory: Activity 1: Addition of zinc dust into copper sulphate solution taken in a test tube. Activity 2: Addition of an iron nail into copper sulphate solution taken in a test tube. He noted down his observations and concluded that chemical reaction occurs in both the cases based on the observed colour change of the resulting solution. What is the final colour of the solution in Activity 2?