Answer: 
Example:
Explanation:
science:                               
the water cycle                  
a volcano exploding           
a rock forming 
Not science:
https://undsci.berkeley.edu/article/0_0_0/whatisscience_12
 
        
             
        
        
        
One sperm fertilizes the egg cell forming a diploid zygote, the other sperm fuses with the two polar nuclei forming a triploid cell that develops into endosperm 
        
             
        
        
        
The stem has more things to transport that's why it has more vascular bundles. The roots only get water from the ground and moving nutrients from the soil to transfer it to the stem. Having more vascular bundles helps the stems to transfer things to leaves and other parts of the plants.