1) A cell which carries all the genetic information that will ultimately lead to the formation of a particular individual: DNA  

2) Minute openings on the stem: Lenticels  

3) Force developed during osmosis: Osmotic Pressure  

Explanation:  

• DNA is a double helix structure that stores all the genetic information of an individual and is responsible for the physical and behavioral traits of the individual as he or she grows up.  
• Lenticels are very small permanent openings in the stems of the trees that help in respiration.  
• Lastly, it is the osmotic pressure that helps in the occurrence of the osmosis process.