Answer:
D. by taking in oxygen and cleaning out waste gases like carbon dioxide.
Explanation:
The respiratory system cleans out your carbon dioxide and replaces it with oxygen.
 
        
                    
             
        
        
        
Answer:
A punnet square can be described as a diagram which is made to check the outcomes of a cross. 
To check the probability of the offsprings of a cross between homozygous dominant thumb shape parent with a homozygous recessive thumb shape parent, let's draw a punnet square:  
         t              t
T    Tt            Tt
T    Tt            Tt
The results of the punnet square depict that:
Genotype: All of the offsprings will be heterozygous for the thumb shape trait. Tt will be the genotype.
Phenotype: All of the offsprings will show the thumb shape like the thumb shape of the dominant parent. 
 
        
             
        
        
        
Answer:
chemical energy is converted into light
Explanation:
 The process by which green plants and some other organisms use sunlight to say to synthesize foods from carbon dioxide and water. It transforms light energy into chemical energy during photosynthesis.
 
        
             
        
        
        
this is the answer pls mark me as the brainliest
 
        
             
        
        
        
Answer:
They break down dead organisms and recycle nutrients. They directly help to maintain the population sizes of different predators. They primarily eliminate toxins from the water that can harm phytoplankton.
Explanation:
Hope it helps I found it on brainly