Question

what is a limiting nutrient? a a nutrient that is so scarce that it limits the growth of an organism b a bacteria that converts nitrates (no₃⁻) in the soil into nitrogen gas (n₂) c a nutrient that is so toxic that its presence limits the growth of an organism d a nutrient that is so abundant that it does not limit the growth of an organism

Explanation:

A limiting nutrient is defined as a nutrient that is in short - supply relative to an organism's needs, thus restricting its growth. Option B describes a type of bacteria involved in the nitrogen cycle, not a nutrient. Option C refers to a toxic substance, not a limiting nutrient. Option D describes an abundant nutrient which does not limit growth.

Answer:

A. a nutrient that is so scarce that it limits the growth of an organism