Answer:
B.Evolution, natural selection
Explanation:
 Charles Darwin is known as the "Father of Evolution" because he proposed the idea of evolution by way of natural selection.
 
        
                    
             
        
        
        
So the plant will grow faster in better soil. 
        
             
        
        
        
Answer:
Option-C
Explanation:
Action potential refers to the generation of electrical activity due to the influx and efflux of ions in the cell.
The cell which transmits the action potential is known as the neuron and the neuron maintains the membrane potential at -70 mv. The influx of sodium ions causes depolarization when it crosses the threshold value.  
The generated action potential now travels in the neuron through its long tubular structure called an axon.  The axon transmits the signal from the cell body towards the axon terminal and thus is known as the down the axon.
Thus, Option-C is the correct answer.
 
        
             
        
        
        
4, even plant cells have cell membranes.
        
                    
             
        
        
        
Answer: 26 stripes
Explanation:
On average, each plains zebra will have roughly 26 stripes per side. Mountain zebra - This is a threatened species, and is native to south-western Angola, Namibia, and South Africa. On average, each mountain zebra will have approximately 43 stripes per side.