As a result of the excessive use of herbicides and pesticides,which types of varieties were selected in a short period?

In a gene pool,along with beneficial mutations,those mutations also exist which are damaging to an individual. It has been found that these mutations are often not eliminated from the population because:
$I.$ They have survival value.
$II.$ They are acquired.
$III.$ They are recessive and carried by heterozygous individuals.
$IV.$ They show genetic drift.
Choose the incorrect option$(s)$ regarding why these mutations persist in the gene pool.

$A$ mutation is most likely to have a selective advantage in evolution if:

What are the key concepts in the evolution theory of Darwin?

Following are sex ratios obtained from a given area. Which one will show an evolutionary stable strategy between males and females respectively?

Select the appropriate option for $Saltation$.