What did people rely on rivers for during the eighteenth century? select the three correct answers.

producing electricity

sending telegrams

transporting people and goods

collecting drinking water

powering mills

transporting people and goods

collecting drinking water

powering mills

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.