Question

Dios.

In the early 1900s, California citrus growers sprayed their trees with cyanide gas to kill scale insects. By 1914, some scale insects were
surviving the spraying, and eventually the whole population showed resistance to cyanide. Which of the following statements best
explains how resistance to cyanide spread in the scale insect population?
OA Insects without a resistance gene underwent mutation O B. Insects with a resistance gene survived the first
upon contact with the cyanide to acquire resistance.
cyanide sprayings and passed the gone to their
offspring.
OC Predators put greater selection pressure on insects
with a resistance gene than on insects without a
resistance gene.
OD Parasites infecting the insect population carried the
trait from insects with a resistance gene to insects
without a resistance gene.

Answer 1

B. Insects with a resistance gene survived the first cyanide sprayings and passed the gene to their offspring

Step-by-step explanation:

So, just by chance, one or more bugs already had some genes that provided them resistance to fight the cyanide. These bugs survived and the rest died. So since only the resistance bugs survived, they transferred their genes onto their kids and now kids are also immune. Now the cycle continues over generation until everyone is pretty much immune to the sprays.

This is exactly why we are currently facing and will face massive deaths due to bacterial resistance to the antibiotics we use.