Water and minerals
Chemical constituents of living cells · Biology
Molecule viewer
Interactive 3DBall-and-stick models with true bond angles — switch molecule to compare shapes.
Controls
Drag the sliders or type a value — the simulation updates live.
Study notes
Example: A farmer notices young leaves turning yellow between veins (chlorosis) — a classic iron deficiency, since iron is needed to make chlorophyll. Spraying iron sulphate greens them up. In humans, iron-poor diets cause anaemia: less haemoglobin, so less oxygen delivery, causing fatigue.