What is Bilirubin?
When red cells are destroyed, orange yellow pigments called bilirubin. It is produced from haemoglobin. Bilirubin is converted into bile in the liver and excreted in the faces.
Functions of Roots
Primary functions of roots:- 1. They help in fixing the plant firmly with the soil. 2. The roots absorb water and mineral salts. 3. It binds the soil. Secondary functions of roots:- 1. Root floats:- They help in floating. e.g jussiaea 2. Reproductive roots:- They can help in multiplication of plants i.e vegetative propagation e.g. sweet potato. 3. Hygroscopic roots:- They can absorb the water from atmosphere with the help of special tissue velamen e.g Vanda 4. Assimilatory roots:- They help in synthesis of food e.g:- Podostemon 5. Respiratory roots:- They may serve for respiration e.g:- Rhizophora. 6. Storage of food:- They can store the food by becoming fleshy e.g:- Radish 7. Helping plants to climb:- They may help in climbing the weak stem e.g:- Pothos
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