Question

.........., a related phenomenon, occurs when the genetic mutation that made the pest resistant to one pesticide also makes it resistant to others

• A. Multiple resistance
• B. Cross-resistance
• C. Mutation
• D. Both A and B

Answer 1

The correct option is B Cross-resistance

In multiple resistance the pests are resistant to more than one class of pesticide. This can happen when pesticides are used in sequence, with a new class replacing one to which pests display resistance with another.

Cross resistance occurs when the genetic mutation that made the pest resistant to one pesticide also makes it resistant to others, often those with a similar mechanism of action.

Mutation is the changing of the structure of a gene, resulting in a variant form which may be transmitted to subsequent generations.

So, the correct answer is option B.