Answer:
Lignin.
Explanation:
The structural integrity of plant spores is lignin that is present in many parts of the plant. This lignin provides hardness to the plant body which help them to stand the plant erect. If this lignin is not present in the plant body the plant will not stand erected. This lignin is present in large amount in the stem of plant body so that's why the lignin provides structural integrity to plant spores
 
        
             
        
        
        
Answer:
Here 
Explanation:
ATP stands for adenosine triphosphate. It is a molecule found in the cells of living organisms. It is said to be very important because it transports the energy necessary for all cellular metabolic activities
 
        
                    
             
        
        
        
No machine can do the work of one extraordinary person." ~ Elbert Hubbard. "You don't get paid for ...
        
             
        
        
        
Answer: this is a tougher one but I would say just do your best ;)
Explanation:
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Answer:
What is the difference between microevolution and macroevolution? Microevolution deals with changes in the gene pool of a single population. Macroevolution considers the broad pattern of evolutionary change over long periods of time and includes the origin of new groups.