A root hair cell absorbs nitrate ions ( $NO3−\text{NO}_3^-$ ) from a dilute soil solution into its cytoplasm, where the concentration of nitrate ions is significantly higher. At the same time, the cell must maintain an optimal surface area to volume ( $S A : V$ ) ratio to supply its internal volume efficiently.

Which option correctly identifies the transport mechanism for this nitrate absorption and describes the change in the $SA:V\,$ ratio as a cell of the same shape grows and increases in volume?

Facilitated diffusion; the $S A : V$ ratio increases

Active transport; the $S A : V$ ratio decreases

Active transport; the $S A : V$ ratio increases

Facilitated diffusion; the $S A : V$ ratio decreases

Which option correctly identifies the transport mechanism for this nitrate absorption and describes the change in the $SA:V\,$ ratio as a cell of the same shape grows and increases in volume?

Facilitated diffusion; the $S A : V$ ratio increases

Active transport; the $S A : V$ ratio decreases

Active transport; the $S A : V$ ratio increases

Facilitated diffusion; the $S A : V$ ratio decreases

2.1 Supplying the cell

Question 5

Markscheme

2.1 Supplying the cell

Question 5

Markscheme

2.1 Supplying the cell

Question 5

2.1 Supplying the cell Questions

2.1 Supplying the cell

Question 5

2.1 Supplying the cell Questions