A scientist argues that genes that code for small size in cows become less common over time due to selective breeding. Predict how you could use the data to support this argument.

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

you need to have a picture of the atom that way we can answer it