Some insects are resistant to certain pesticides, chemicals that are sprayed on crops to keep the insects from eating them. The insects that are resistant are not affected by the pesticides. The resistance to pesticides that some individual insects have is a result of

Explanation:

cross-resistance hope that helped.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands