Answer:
I believe you just answered it yourself. they development an immunity to insecticides the more they are exposed to it.
2 because the 1st energy level can only hold 2 electrons and the 2nd holds 4
The very primitive organism is the oldest because, over time, organisms gradually evolved into more complex organisms. First came the primitive organism, then it evolved into the more complex one, or the younger fossil.
Answer:
Meters/grams are the most common.
Explanation:
Grams are very exact and meters are also common to use.