Question

DDT resistant mosquitoes and different break sizes of African seed cracker finches show ______ type of selection respectively.

Options

• stabilizing and directional

• disruptive and balancing

• directional and disruptive

• balancing and directional

Answer 1

DDT resistant mosquitoes and different break sizes of African seed cracker finches show directional and disruptive type of selection respectively.

Explanation:

• DDT-resistant mosquitoes are an example of Directional selection, where one extreme trait (resistance) is favoured over others.
• Different beak sizes of African seed cracker finches illustrate Disruptive selection, where both extremes are favoured over the intermediate form.