I think the relationship is Commensalism ( relationship between two organisms in which one benefits and the other does not benefit nor is harmed ) because the bird benefits and the cow does not benefit nor is harmed. Hope this helped ☺
        
                    
             
        
        
        
Individuals with these mutations typically have familial hypercholesterolemia.
These genes provide information for the formation of the low-density lipoprotein receptor, a receptor that binds to low-density lipoproteins (LDLs). LDLs carry the cholesterol in the blood and regulate the amount of cholesterol in the circulation. Mutations to these genes either reduce the number of receptors or cause several disruptions to their function. This results in high blood cholesterol levels and in a higher risk for heart disease. 
        
                    
             
        
        
        
Because it helps us understand our past, which in turn allows us to understand our present.
        
                    
             
        
        
        
Answer:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
Explanation:
The duplicated homologous chromosomes pair, and crossing-over (the physical exchange of chromosome parts) occurs.
 
        
             
        
        
        
Answer:
chloroplasts
Explanation:
"<em>Photosynthesis takes place inside plant cells in small things called chloroplasts. Chloroplasts (mostly found in the mesophyll layer) contain a green substance called chlorophyll. Below are the other parts of the cell that work with the chloroplast to make photosynthesis happen.</em>"
Credit goes to https://www.eschooltoday.com for the quote