Answer: D. Mitochondrion
Explanation:
The mitochondrion is always the powerhouse of the cell!
 
        
             
        
        
        
The normal force is greater than the force of gravity
        
             
        
        
        
Answer:
Explanation:
Biodiversity, also called biological diversity, the variety of life found in a place on Earth or, often, the total variety of life on Earth. A common measure of this variety, called species richness, is the count of species in an area.
 
        
                    
             
        
        
        
The correct answer is D: Schleiden and Schwann