Identify an independent variable of the researchers' experiment. Justify the scientists' feeding both groups of birds the same type and amount of food during
the experiment. Identify the control group for each species that the researchers
should include in their experiment.
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Give the biological term for: structures that display characteristics of living organisms only within living cells

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.

Explain what is meant by a river’s load, and describe how the load is carried.