JAMB - Biology (1979 - No. 6)
Which of the substance listed below is a trace element of plants?
Potassium
Sodium
Copper
Phosphate
Nitrate
توضیح
Copper is considered a trace element for plants because it is needed in small amounts for plant growth and development, acting as a co-factor for various enzymes and playing roles in photosynthesis, respiration, and other vital processes.