a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots?

Question

a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots?

a)osmosis
b)facilitated diffusion
c)active transport
d)filtration

I chose c) active transport

anyone knows for sure? thanks

Answer 1

Right.

Here's a previous answer to this question.

http://www.jiskha.com/display.cgi?id=1280935799

Answer 2

Yes, you are correct. The mechanism that explains the movement of nitrates from the soil into the plant's roots is active transport. Active transport is the process by which molecules or ions are moved across a cellular membrane against their concentration gradient using energy in the form of ATP (adenosine triphosphate). In this case, the plant roots are actively transporting nitrates into their cells, even though the concentration of nitrates is higher inside the roots than in the surrounding soil. The other options (osmosis, facilitated diffusion, and filtration) do not involve the energy-dependent transport of substances against their concentration gradient, so they are not applicable in this scenario.

Answer 3

Yes, you are correct. The mechanism that explains the movement of nitrates from the soil into the plant's roots is active transport (option c).

To explain further, active transport is a process that requires energy to move substances against their concentration gradient. In the case of nitrates, the concentration of nitrate ions tends to be higher in the soil compared to the plant's roots. However, through active transport, the plant is able to actively take up nitrates from the soil into its root cells.

This process occurs through the involvement of protein pumps present in the cell membrane of the root cells. These protein pumps use energy (often in the form of ATP molecules) to actively transport nitrate ions from an area of lower concentration (inside the root cells) to an area of higher concentration (the soil surrounding the roots).

By utilizing active transport, plants can absorb essential nutrients like nitrates even when their concentration is lower in the root cells compared to the surrounding soil. This enables the plant to acquire the necessary nutrients for growth and development.