In a species, the weight of newborn ranges from $2$ to $5\; \mathrm{kg} .97 \%$ of the newbom with an average weight between $3$ to $3.3\; \mathrm{kg}$ survive whereas $99 \%$ of the infants born with weights from $2$ to $2.5\; \mathrm{kg}$ or $4.5$ to $5 \;kg$ die. Which type of selection process is taking place?
Directional Selection
Stabilizing Selection
Disruptive Selection
Cyclical Selection
Name the type of natural selection depicted in the given diagram (type $I,$ type $II$ and type $III$)
$[Image]$
Type $I$ Type $II$ Type $III$
Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as
Random genetic drift in a population probably results from
Genetic drift operates in