A new plant nutrient is discovered that is needed at 5g/kg of plant dry matter and is required for photosynthesis. When this nutrient is added to the plant as a fertilizer, plant growth increases in comparison to a control group that did not receive the nutrient fertilizer.This nutrient is (check all that apply)
A. a micronutrient.
B. a macronutrient.
C. an essential element.
D. a limiting factor.
Answer: D
Biology & Microbiology
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