Its important because it tells us the difference between populations and individuals
The experimental group is the group you change from the normal. the fertilizer group is experimental
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.
I would say D
B. Because of Farm laws that require no seeds to be kept from a harvest, or you are not allowed to have plants of a different genetic make or made by a different company in your field if you didn't buy it, you could have wind carry seeds into opposing fields, and if inspected, you would potentially have to pay a fine for having unauthorized varieties growing in your field. And trying to remove it would be a pain, because you would either have to find a killer that your plants are resistant to, or to find these individually and pluck them, or to spray a killer that would kill all of your plants, but none of these resistant varieties
