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Question
jami is doing an experiment to find out how temperature slows down or speeds up the sprouting of bean seeds. to prepare for the experiment, she plans to put soil into three foam cups and place six seeds in each cup. when jami performs the experiment, which of the following should she keep the same for all of the cups of beans? i. the amount of sunlight ii. the amount of water iii. the temperature iv. the amount of fertilizer a. i and iii only b. ii and iii only c. i, ii, and iv only d. i and ii only
En un experimento, para determinar el efecto de una variable (en este caso, la temperatura) sobre el brote de las semillas, se deben mantener constantes las demás variables posibles que podrían afectar el resultado. El sol, el agua y el fertilizante son factores que pueden influir en el brote de las semillas, por lo que deben ser iguales en todos los grupos de experimento para que la temperatura sea la única variable que cambie.
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C. I, II, and IV only