Answer:
C
Explanation:
 They does not carry oxygen to injured areas of tissue
 
        
             
        
        
        
Answer:
Phytoplankton use carbon dioxide and produce oxygen during photosynthesis; phytoplankton, fish, and seals use oxygen and produce carbon dioxide during respiration. Which can provide the most energy in an ecosystem
Explanation:
 
        
             
        
        
        
Answer:
During anaerobic respiration lactic acid is produced which is not good for human. It causes muscle pain.
ATP produces during anaerobic respiration are less while aerobic respiration produces more ATPs.
Explanation:
During anaerobic respiration lactic acid is produced which is not good for human. It causes muscle pain.
ATP produces during anaerobic respiration are less while aerobic respiration produces more ATPs.
Aerobic respiration
It is the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.
Glucose + oxygen → carbon dioxide + water + 38ATP
Anaerobic Respiration
It is the breakdown of glucose molecule in the absence of oxygen and produce small amount of energy. Alcohol or lactic acid and carbon dioxide are also produced as byproducts.  
Glucose→ lactic acid/alcohol + 2ATP + carbon dioxide