Functional and economically most important mineral in nutrition of layers
is calcium, primary because of egg production, i.e. forming of the egg shell.
        
             
        
        
        
The answer is (A)
Hope this helps
        
             
        
        
        
Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called prokaryotes. 
<h3>What are prokaryotic cells?</h3>
Prokaryotes are organisms whose cell (or cells) are characterized by the absence of a nucleus or any other membrane-bound organelles.
Prokaryotic cells are opposed to their eukaryotic counterparts that possess a membrane-bound nucleus that houses their genetic material (DNA). 
Examples of prokaryotes are as follows:
Therefore, cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called prokaryotes. 
Learn more about prokaryotes at: brainly.com/question/15329345
#SPJ1
 
        
             
        
        
        
Answer:
Ceiling
Explanation:
A situation in which the price charged for some marketed objects becomes more or less than the equilibrium price that is determined by market forces of demand and supply, is called Price Ceiling. Government often uses price ceiling to control the maximum selling price of commodities. By doing this, the commodities are made affordable for the public in country. In house rent market, price ceiling is of great importance.