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Question
Concentration of mineral nutrient elements is higher inside the root hairs than in the surrounding soil. How do roots take them in from the soil?
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Solution
If the concentration of mineral nutrient elements is higher inside the root-hairs than in the
surrounding soil, then roots take them in from the soil by 'active transport'. In active transport, the mineral ions are forcibly carried from the surrounding soil i.e. the region of their lower concentration into the roots i.e. the region of their higher concentration through the cell membrane by expenditure of energy. This energy is supplied by the cell in the form of ATP.
RELATED QUESTIONS
The phenomenon of loss of water through a cut stem or injured part of plant is called ___________.
State whether the following statement is true or false. Rewrite the false statement correctly.
Water absorption mainly occurs through the root-hair.
Explain why:
Raisins swell up in water.
Choose the correct answer:
Wilting of plants occurs when ____________
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Dry seeds when submerged in water swell up due to endosmosis.
Multiple Choice Question:
In soil, water available for absorption by root is ______.
Minerals cannot be passively absorbed by the roots.
Identify the zone in wbkh root hair occurs.
____________plants like orchids absorb water vapours from air with the help of epiphytic roots having special tissue called velamen.
