Explanation:
The flow of the river is dependent upon the position along the stream in terms of the gradient. Near the top of a high gradient, the flow will be less than that near the bottom. Likewise, the steeper the river's gradient, the faster the flow of water (due to the pull of water down the gradient by gravity).
 
        
             
        
        
        
Explanation:
Terrestial Animals - Animals which can only live on Land.Examples:- BEAR- CAT- DOG- DEER
 Aquatic Animals - Animals which can only live on Water.
Examples:- FISH- OCTOPUSES- LOBSTERS- SEAHORSE
 Amphibians - Animals which can live both on land and on water.
Examples:- FROGS- TOADS- SALAMANDERS
 Arboreal Animals - Animals which live primarily on trees.Examples:- SQUIRREL- RODENTS- CHAMELEON
 
 
        
             
        
        
        
Answer:
Active transport: movement against a gradient 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 proper concentrations of ions and molecules in living cells.
        
             
        
        
        
Answer:
Mass/mass percent concentration means the mass of the solute/mass of the solution times 100. You know both the mass of the solute (0.870 g protein) and the mass of the solution (10.279 g solution). So divide and multiply your result by 100.  (0.870 / 10.279 * 100)
Explanation: