Answer: "To move substances against a concentration or electrochemical gradient, a cell must use energy. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells."
Material through which water flows is permeable. This material can be either natural or artificial. Naturally permeable material can be clean sand and gravel for example, or a sandstone and in the latter case the sandstone can have both porosity which is not synonymous with permeability as the pores must be connected to be permeable. An impermeable membrane could be used to line ditches for example to prevent leakage near mines.
What’s the rest of the question
Because people may make fun of you or call you some terrible things because stds are often linked by sleeping around (obvi not always true but that’s what people make it out to be)
and i’m good lol you?
Answer:
Movement of free water molecules from an area of low concentration to an area of higher concentration
Explanation:
