NEET Biology question

BiologyTransport in PlantsNEET

Not in NEET syllabus

Identify the true and false statements and select the correct option from the codes given below. I. As suction pressure increases, water absorption also increases, which in turn increases the absorption of ions II. Absorption of ions is affected by transpiration pull III. A large amount of charged particles is absorbed along with absorption of water IV. Pressure flow hypothesis depends entirely on the existence of a mechanism for loading sugars into phloem at the source region and unloading it at the sink V. Contents in the sieve tube move unidirectionally

Answer: (A)

Solution

Statements I, II and III are true: increased transpiration/suction pressure raises passive water (and accompanying ion) uptake by roots. Statement IV is true: the pressure flow mechanism is entirely dependent on active loading at the source and

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Question ID VK-127803