Head Area: The nose and mouth take in oxygen that goes through the throat and into the lungs. There are 2 ways, but a little flap opens when oxygen comes in and closes right after. This is used so food doesn't get in the wrong way.
Chest Area: Capillaries in the lungs move the oxygen to the heart to pump it throughout the body.
        
             
        
        
        
Answer:
I'm not great at science and especially not biology but 
Explanation:
the energy is transformed by the nucleus inside the cell and energy is held there it will soon release motonchdria holds the blood cell and energy will be transformed somewhat that way sorry if it doesnt help
 
        
             
        
        
        
Answer:
the correct answer is A
Explanation:
definition of a decomposer is an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
so A is the answer
If brainiest is earned its greatly Appreciated
 
        
             
        
        
        
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
        
             
        
        
        
Producers are very important to ecosystem reason being without the producers we would not be able to survive. Producers make their own food by use of sun which turns simple raw materials into food.
 Herbivores are consumers who eat only green plants. Omnivores eat animals and plants. Scavengers only eat dead organisms. Scavengers help the environment in that they eat dead organisms and decomposes the broken organic material down to the raw material.