If gene migration happens multiple times,it would lead to

Natural selection leads to the directional change when:

Darwin's theory of evolution was primarily based on which of the following concepts?

In a species,the weight of newborn ranges from $2$ to $5 \; kg$. $97 \%$ of the newborns with an average weight between $3$ to $3.3 \; kg$ survive,whereas $99 \%$ of the infants born with weights from $2$ to $2.5 \; kg$ or $4.5$ to $5 \; kg$ die. Which type of selection process is taking place?

Prodigality of reproduction in Darwinism refers to:

In forming the theory of evolution by natural selection,Darwin was greatly influenced by