The lymphatic system destroy harmful substances 'By producing antibodies'. 
The lymphocytes contained in lymphatic organs are produced with other defence cells by the bone marrow. They are then dispersed to eliminate pathogens.
        
                    
             
        
        
        
Answer:
a. True.
Explanation: 
Even though the cells in our body rely on glucose as a source of energy, they can replace glucose's energy with lipids or proteins' energy. In the brain's case, this is not possible since the blood-brain barrier, which is a highly selective barrier between the blood and the extracellular fluid in the central nervous system, allows the passage of glucose as the only source of energy. This is why maintaining the correct levels of glucose is crucial for the metabolism in the brain.
 
 
        
             
        
        
        
Answer:
hkafb I have to go to a meeting
 
        
             
        
        
        
Answer:
Algal blooms occur when algae multiply very quickly. Blooms can form in waters that are rich in the nutrients the algae need to grow, such as nitrogen, phosphorous, and iron. ... Blooms may become more frequent as the earth warms and the levels of nutrients in our waters increase.
 
        
             
        
        
        
Answer:
Valence electrons, or the electrons that are farthest from the nucleus.