The answer is to do what you must my friend, goodluck!!
#1
Inner stem cell mass
#2
Harvested Unspecialized Embryonic Stem Cells
        
                    
             
        
        
        
Answer:
1.A tissue is a collection of similar cells that work together to perform a specific job.
An organ is a collection of different tissues that work together to perform a specific job. The function of a part of an organism is what it actually does (it's job)
2.The structure of the alveoli as a web of blood vessels surrounding an air sac allows blood cells take in oxygen and bring it into the lungs (organ)
 
        
                    
             
        
        
        
Answer:
The study of oceans and their life.
Explanation:
The study of oceans, including seawater, the ocean floor, and marine plants and animals.
 
        
                    
             
        
        
        
They help because if you can adapt to things a camouflage evolution  will be eaiser.