Excretory products in plants responsible for the discoloration of flowers are called__________

Step 1: Analyze the question The question asks which plant excretory product gives flowers their colors (or changes their color).

Step 2: Explain the concept Plants don't have special excretory organs. Instead, they store or get rid of waste products in different ways. Common plant excretory products include:

• Alkaloids (e.g., quinine, morphine, caffeine, nicotine): nitrogen-containing compounds, often bitter and medicinal or poisonous.
• Tannins: used in tanning leather and found in bark and unripe fruits. They give a bitter, astringent taste and a brownish color.
• Anthocyanins: water-soluble pigments in the cell sap. They produce red, purple, and blue colors in flowers, fruits, and sometimes leaves.
• Resins: sticky substances from trees such as pine, used in making varnish.
• Latex: a milky fluid from rubber trees and pawpaw.

Step 3: Work through the options

• A. Alkaloids: they act as defenses or drugs, not pigments for flowers. ✗
• B. Tannins: they are linked to the brown color in bark and dead tissue and to astringency. They are not the main flower pigments. ✗
• C. Anthocyanins: they are the pigments responsible for the red, pink, purple, and blue colors of flowers. ✓
• D. Resins: they are sticky secretions used for protection and sealing wounds. ✗

Step 4: Answer The excretory products responsible for the coloring of flowers are anthocyanins, which is option C.

Tip: Think "Antho" = flower (Greek anthos) and "cyan" = blue. So anthocyanin means "flower blue" or flower color. If you see "flower color" in a question, look for the word that starts with "antho."