The prefix “hydro-“ relates to water
You can rub a permanent magnet against something else that can be magnetized, like a paper clip.
A. Natural Selection. This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene. Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.
The cell is the smallest functional unit of life, which is why it is sometimes referred to as the building block of life.
