Question

Tracer elements are those that are

• A. Required in small amount by the plant
• B. Radioactive and can be used to investigate a process in the plant
• C. First to be traced in the plant
• D. Present in traces in the soil solution

Answer 1

Answer: (A)

Required in small amount by the plant

Tracer elements are those elements which are required in very small quantities i.e., less than 0.1 gm/mg of dry weight of plant. They are also called micronutrients or trace elements.

Hence, option A is the correct answer.