Question

_——— nutrients are needed in small quantities for plants and are called _———

Answer 1

Micronutrients

1. Seven nutrients are needed in small quantities for plants and are called Micronutrients.
2. Micronutrients needed are Iron, Manganese, Copper, Molybdenum, Zinc, Boron, and Chlorine.
3. Iron is a constituent of proteins required in the transfer of electrons like ferredoxin and cytochromes.
4. Manganese activates enzymes involved in photosynthesis, respiration, and Nitrogen metabolism.
5. Zinc activates enzymes and carboxylases.
6. Boron is required for uptake and use of Ca²⁺, pollen grain germination.
7. Chlorine is important for the Z-scheme reaction in photosynthesis.

Final answer: Seven nutrients are needed in small quantities for plants and are called micronutrients.