2. Antigen
 Toxins 
3. Some bacterial infections 
 Viral
4. Innate immune system 
5. Adaptive 
6. Leukocytes 
7. Humoral response
 Cell mediated response
8. B cells 
 T cells 
9. Helper T cell
 Cytotoxic T cell
10. Antibody production. 
        
             
        
        
        
Movement is the main function of muscular tissue. They have the ability to contract and this is what brings about the movement of body parts. They also help to maintain body posture and position.
        
             
        
        
        
Answer:
A.) Pollen are well preserved in the sediment layers because they are highly resistant to decay.
B.) Other indicators that can be used to determine past climates are through the analysis of the width of tree rings and the coral reefs formed underwater.
 
        
             
        
        
        
B pimples can last more than 2 days