When a sperm and an egg unite , they form a zygote
        
             
        
        
        
Answer:
C
Explanation:
Both the Bee and the flower are benefiting from each other 
 
        
                    
             
        
        
        
The answer is A 
The development of the cell theory involved different ideas from different scientist. 
To support my answer it was created to Matthias and Theodor,however, there were like many other scientists like Rudolf contributed to the theory.
I hope that's help:0
Please chose me for the Brainliest answer :) thx
 
        
             
        
        
        
Answer - An increase in the width of Stem
(Was answered before in the community)
Credit goes to [PeachSoda]
Reasoning Why I agreed - Plants can grow in the root tips which shows the progression of growth and thats why you would find a lot more plant cells because it will always keep growing.