They could improve the experiment that they made by adding another variable such as: watering the plants with fresh water. This way they could have a better comparison how plants grow based on the type of water they are exposed with.  
        
             
        
        
        
A moraine is a landform feature which is formed by the glacier retreating. The ridge of sediments that geologists found has a feature namely moraine.
<h3>What is moraine?</h3>
The materials usually soil or rocks left behind by the glaciers are called moraine. 
Just like rivers that carries all sorts of debris and silt and eventually builds up to form deltas, similarly glaciers moves all sorts of dirt and boulders that assembles to form moraines.
As the geologist found a ridge of sediments and notices a glacier in the distance so this is the moraine.
Thus, the correct answer is C.
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Answer:
Increase
Explanation:
As CO2 enters the blood, most of it is converted to the carbonic acid in a reaction catalyzed by carbonic anhydrase. The carbonic acid dissociates into hydrogen ions and bicarbonate ions. As the H+ concentration increases, the blood pH decreases. Thus, the increased partial pressure of CO2 produces a more acidic environment. Increasing the volume of air that reaches the alveoli and takes part in gaseous exchange will increase the rate of removal of CO2 from the blood. The reduced CO2 levels in the blood would increase the blood pH. 
 
        
             
        
        
        
Answer:
(A) (B) (E) those should bee the right answers
Explanation:
 
        
             
        
        
        
Answer:
D 
Explanation:
The fossil record provide evidence that Older species have rise to more recent species