<span>D.It has affected the fates of a space probe and a commercial airline flight.</span>
        
             
        
        
        
Science method. like the gemdas is math there’s a process for science which depends on chem or bio.
        
             
        
        
        
Answer:
chemical reactions change reactant and produce new substance called products.
Explanation:
chemical reaction is a change which will produce a new substance. ( while physical reaction does not produce a new substance. 
 
        
                    
             
        
        
        
Answer:
cell
tissue
organ
system
human organism
Explanation:
unicellular organisms only have one cell since two or more cells form a tissue their level of organization is restricted to cell
cell
two or more cells form a tissue
two or more tissue forms an organ
two or more organs form a system which must work in coordination for efficiency
two or more systems make up a human organism
 
        
             
        
        
        
Answer:d.Paleozoic Era
Explanation:
Paleozoic Era is hallmarked by climate, animals & plants.
This Era includes the Ordovician Period, Silurian Period and the Devonian Period. 
The Silurian Period is one during this era where aquatic plants and animals evolved.