A salt or ester of phosphoric acid, containing PO43− or a related anion or a group such as —OPO(OH)2.
        
             
        
        
        
The answer, is bryophytes are also called pioneer plants. 
i hope this helped you out :)
        
             
        
        
        
A stationary front is the least likely to be associated with rainfall.
        
                    
             
        
        
        
Answer:
Purple colour arises due to the dominant alleles whereas white colour arises due to the recessive alleles. 
For the purple colour to arise, even one of the dominant allele will be enough to cause the effect. On the other hand to see the recessive white trait, both the alleles of the gene should be recessive.
To ensure that only white flowers are grown, the farmers need to cross both white flowered plants to get the desired result.