Answer: Anything that has an Origin, composition, and texture. 
Explanation:
May be Minerals, feel rough or smooth, and can be hundreds or thousands of years old.
 
        
             
        
        
        
Answer:
The reason why zebra and wildebeest graze in harmony together is because they each eat different parts of the same type of grass. Because wildebeest have no natural leader, the migrating herd often splits up into smaller herds that circle the main, mega-herd, going in different directions.
Explanation:
hope this helps!! (:
 
        
             
        
        
        
Answer:
In the traditional phylogeny platyhelminthes is depicted as a lophotrochozoan phylum. What probably led to this change?
The removal of the acoel flatworms (Acoela) from the Platyhelminthes allowed the remaining flatworms to be clearly tied to the Lophotrochozoa.
Explanation:
 
        
             
        
        
        
Chewing a saltine cracker is a physical change