NEET BIOLOGY

Detailed explanation-1: -Score on the test. When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer? Independent.

Detailed explanation-2: -In the experiment mentioned in the question, water and light are kept equal hence they are the independent or constant variable, As fertilizers are being changed, hence it is the dependent variable.

Detailed explanation-3: -In this experiment, the addition of fertilizer is the independent variable manipulated by the scientist. Plant height is the dependent variable that responds to the change in the independent variable. Each plant is exposed to an equal amount of sunlight, so sunlight is the control variable.

Detailed explanation-4: -In the plant experiment, the independent variable could be fertilizer-some plants will get fertilizer, others will not. The scientists change the amount of the independent variable (the fertilizer) to observe the effects on the dependent variable (plant growth).

Detailed explanation-5: -Independent Variables Volume of water given to plants. Nitrogen or phosphorus concentration in soil. Duration or intensity or wavelength of light plants are exposed to. Concentration or type of fertilizer.