During its transport from soil to root, a mineral ion would come across the following cellular structures in a specific sequence. Pick the representation that depicts the correct sequence.

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Primary cell wall $\to$ Plasma membrane $\to$ Tonoplast $\to$ Cytoplasm

Primary cell wall $\to$ Plasma membrane $\to$ Cytoplasm $\to$ Tonoplast

Cytoplasm $\to$ Plasma membrane $\to$ Tonoplast $\to$ Primary cell wall

Plasma membrane $\to$ Primary cell wall $\to$ Cytoplasm $\to$ Tonoplast

answer is B.

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Detailed Solution

Wate ris absorbed along with mineral solutes by root hairs by diffusion.Water moves deeper into root layers via apoplastic and symplastic pathways.Symplastic pathway involves movement of water through interconnected protoplasts via plasmodesma.when wate rmove sthrough this pathway,it travels through the cells, cellwalls- plasma membrane -their cytoplasm - tonoplast (enters vacuoles) .this movement happens down the potential gradient.

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