The most important property of the cell membrane<span> is its selective permeability: </span>some substances<span> can </span>pass through<span> it freely, but others cannot. Small and nonpolar (hydrophobic) molecules can freely </span>pass through<span> the </span>membrane<span>, but charged ions and large molecules such as proteins and sugars are barred passage. </span>
        
                    
             
        
        
        
Answer:
Because stains are made of different types of molecules, a range of enzymes are needed to break them down. Proteases break down proteins, so are good for blood, egg, gravy, and other protein stains. Amylases break down starches, and lipases break down fats and grease. Washing powders usually only contain one type of enzyme, though some have two or all three.
Explanation:
 
        
             
        
        
        
Matter is anything that has mass and occupies space. There are three different states of matter- solid, liquid, and gas.
        
                    
             
        
        
        
A specific animal is A. species
        
                    
             
        
        
        
It would be nitrogen, oxygen, and carbon dioxide (:
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