Answer:
Explanation:
Preparation of competent cells  - 
Transformation
recovery 
plating
 
        
             
        
        
        
Answer: a star expels most of its outer material until only the hot core remains, which then settles down to become a young a white dwarf
Explanation:
 
        
             
        
        
        
Axonomic level: phylum Annelida<span>; grade of construction: organs derived from three tissue layers; </span>symmetry<span>: bilateral; type of gut: complete with anus; type of body cavity other than gut: coelom; segmentation: present; circulatory system: closed system; nervous system: brain, with nerve cords and bundles (ganglia)
i hope this helps </span>
        
             
        
        
        
Answer:
here.
Explanation:
17. antibiotics
 
18. reproduction (growth is increase in size and number)
19. cell walls (like penicillin. This mechanism is important because it will not harm the host as human cells don't have cell walls.)
20. 70S ribosomes (because this is where protein synthesis occurs in bacteria)