Answer: Blood vessels
Explanation: Blood vessels consist of veins, venules, arteries, arterioles and capillaries that absorbs nutrients and minerals from organs and transport them to tissues and cells. It also transport oxygen and carbon dioxide to and from the heart to the lungs. 
Therefore blood vessels are found in almost every organ, tissue and cells in the body to deliver nutrients, remove waste and filter lymph as part of immune system.
 
        
             
        
        
        
Explanation:
Physiological effects of abscisic acid
Abscisic acid acts as growth inhibitor and induces bud dormancy in a variety of plants. 2. ABA is a powerful growth inhibitor. It causes 50 per cent inhibition of growth of oat seedlings.
 
        
             
        
        
        
Answer:
D is the right one i think, biological Adaptation delete this answer if it is wrong
Explanation:
 
        
             
        
        
        
Answer:
The spleen
Explanation:
The spleen acts as a filter for blood by recycling old and defective red blood cells. It also stores red blood cells, platelets and white blood cells. 
 
        
             
        
        
        
Answer:
This process would be the one truly responsible for the "evolution" of mitochondria and chloroplasts as we know them from their prokaryotic ancestors. The cell process that would have initiated endosymbiosis is endocytosis; the process of taking things inside the cell