select the correct answer.\nsarah performs an experiment to determine the effect of nitrogen on plants. she…

select the correct answer.\nsarah performs an experiment to determine the effect of nitrogen on plants. she studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation. which factor is an independent variable?\na. amount of nitrogen\nb. growth of root hair\nc. nodule formation\nd. height of the plants

select the correct answer.\nsarah performs an experiment to determine the effect of nitrogen on plants. she studies the effect of nitrogen on the growth of the root hair, height of the plants, and nodule formation. which factor is an independent variable?\na. amount of nitrogen\nb. growth of root hair\nc. nodule formation\nd. height of the plants

Answer

Brief Explanations:

In an experiment, the independent variable is the factor that is deliberately changed or manipulated by the experimenter. Here, Sarah is changing the amount of nitrogen to see its effects on root - hair growth, plant height, and nodule formation. The growth of root hair, nodule formation, and height of the plants are the dependent variables that are affected by the amount of nitrogen.

Answer:

A. amount of nitrogen