Answer:
 Men cannot be carrier of recessive X linked trait as, it only contain X chromosome which means that the X linked traits are get inherited from mother which are get displayed. The female are expressed X linked disorder during homozygous for disorder and they become carriers. So that means that the traits are related with X chromosome are never be carried by the men.
 
        
             
        
        
        
Answer:
This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.
hope this helps :)
 
        
             
        
        
        
Answer:
Open access (OA) refers to free, unrestricted online access to research outputs such as journal articles and books. OA content is open to all, with no access fees. ... One involves publishing articles or books via the OA route on a publisher's platform (often referred to as gold open access).