In humans, the dental formula of permanent teeth is: MCQ with Answer and Explanation

Explanation:
Magnesium (Mg²⁺) is the central atom in the porphyrin ring of chlorophyll, essential for absorbing light energy during photosynthesis. Iron is central in heme (hemoglobin, cytochromes). Calcium is a secondary messenger and structural component, zinc is a cofactor. Magnesium deficiency causes chlorosis.

Explanation:
Iron (Fe) is a crucial mineral that forms the core of the heme group in hemoglobin, the protein in red blood cells responsible for oxygen transport. Without adequate iron, the body cannot produce enough healthy red blood cells, leading to iron-deficiency anemia. Calcium is for bones, iodine is for thyroid hormones, and magnesium is for enzyme function.

Explanation:
Solanum tuberosum is the scientific name of potato, a member of the Solanaceae family. Solanum melongena is brinjal (eggplant), Capsicum annuum is chili, and Lycopersicon esculentum is tomato. Potato is a tuber (modified stem) rich in starch, and is one of the world's major food crops.