The most substantial pathway of loss of elements in an ecosystem is through streamflow.A system such as a stream moves phosphorous and iron mostly attached to particles,while nitrogen is mostly dissolved.Thus,a stream carries the load of nutrients _______________.
A) As mostly saturated
B) As both dissolved and particulate
C) At high concentrations at all times
D) At low concentrations at all times

Question

Quizplus · Accepted Answer

The sentence states that phosphorous and iron are mostly attached to particles while nitrogen is mostly dissolved. Therefore, the stream carries the load of nutrients as both dissolved and particulate, which is option B. Option A is incorrect because the statement does not mention anything about the saturation of the nutrients. Option C is incorrect because the concentration of the nutrients is not described as high at all times. Option D is incorrect because the sentence does not indicate that the concentration of the nutrients is always low.

The Most Substantial Pathway of Loss of Elements in an Ecosystem