Conlan wants to answer the question, “does phosphorus affect tomato fruit production? ” which statement represents a hypothesis that he can test to answer his question?
if phosphorus affects tomato fruit production, then tomatoes that are fertilized with phosphorus will have larger leaves.
if phosphorus affects tomato fruit production, then phosphorus should be added to the soil during planting.
if phosphorus affects tomato fruit production, then adding phosphorus to the soil will make tomatoes taste better.
if phosphorus affects tomato fruit production, then plants that are fertilized with phosphorus will produce more tomatoes.

Recently, crops of vegetables such as lettuce and green onions have been contaminated, while they are still on the farm, with bacteria that cause food poisoning. how will science influence the way the government responds to prevent an increase in food-borne diseases? because science has shown that lettuce and green onions are not nutritionally valuable, the government may pass laws that ban the sale of lettuce and green onions. because science has shown that there is no way to prevent bacterial contamination, the government may pass laws that punish businesses that buy lettuce and green onions. because science has shown that the washing of hands prevent the spread of infectious diseases among people, the government may pass laws that require hand washing by everyone who handles food. because science has shown there are ways to find the source of the contamination, the government may pass laws that require farm practices that reduce the contamination of lettuce and green onions.