They are composed of thylakoids.
        
             
        
        
        
Answer:
Genetics
Explanation:
Heredity refers to one's genes
 
        
             
        
        
        
Answer:
P generation
Explanation:
The first two individuals that mate in a genetic cross is called the Parental generation or P generation.  This is one of the terms used by Gregor Mendel, the father of modern genetics. P generation refers to the passing of genes or traits of the first set of parents crossed to the offspring. Their offspring are called the first filial generation or F1 Generation.
 
        
             
        
        
        
<span>Commensalism is an interaction in which one of those species would benefit, and the other one would not be affected. Parasitism is an interaction in which one of those species would benefit at the expense of the host organism. Thus, in commensalism we have one positive and one neutral result while in parasitism we have one positive and one negative result.</span>
        
                    
             
        
        
        
Answer:
So blood can reach the fetus
Explanation: