Kilograms I think I might be wrong but that's what I think.
        
                    
             
        
        
        
Answer:
The answer to the question is C
Explanation:
It is used for all I and II and III
 
        
             
        
        
        
So here we have two heterozygous organisms that will mate. You can put them into a Punnet square, just to be sure of your answers and to find all possible genotypes : 
      R      r
R  RR   Rr
r   Rr     rr
So you have RR, Rr and rr as your possible genotypes. 
        
             
        
        
        
Answer:
 b. specialized for absorbing shorter wavelengths of light that penetrate deeper into the water for photosynthesis.
Explanation:
There are two lights which are responsible for the photosynthesis in plants and algae i. e. red and blue light. These two lights are absorbed by the plants and algae in the process of photosynthesis while most of the light colors are reflected. In water red light remains in low depth while blue light penetrate deep into the water due to its shorter wavelength. So that's why red algae can grow due to the presence of blue light and photosynthesis occurs.
 
        
                    
             
        
        
        
Answer:
Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.6  
Explanation: