Elizabeth is conducting an investigation to study how molecules are transported into and out of a cell. elizabeth builds a model of a cell using a u-shaped tube. a barrier, which is permeable to water, but not sugar, is placed on the bottom of the tube to model the cell membrane. elizabeth adds two different solutions to each side of the tube. the solute in each solution is sugar and the solvent is water. the initial levels of solution in side a and side b are equal. the concentration of sugar in side a is lower than the concentration of sugar in side b. what is elizabeth likely to observe? a. water molecules will move from side a to side b. the solution level on side a will fall and the solution level on side b will rise. b. water molecules will move from side b to side a. the solution level on side a will rise and the solution level on side b will fall. c. sugar molecules will move from side a to side b. the solution level on side a will fall and the solution level on side b will rise. d. sugar molecules will move from side b to side a. the solution level on side a will rise and the solution level on side b will fall.

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

9. wind power creates pollution. water air soil noise

How does the nervous system affect the excretory system?