<span>In such conditions, oxygen was available in abundance.</span>
        
                    
             
        
        
        
Answer:
The correct answer is a cofactor for enzyme activity.
Explanation:
Carboxypeptidase is a metallo-enzyme in which zinc is present at active site. It has been accounted for by Coleman and Vallee that the protein can be deactivated by the removal of zinc and that reactive again by the expansion of zinc, cobaltous, ferrous, nickel. which suggests that zinc is acting as the cofactor for this metalloenzyme. Zinc is a cofactor for up to 300 chemicals in the body. Proteins that utilization zinc as a cofactor is known as metalloenzymes.
Thus, the correct answer is a cofactor for enzyme activity.
 
        
             
        
        
        
Explanation:
1. Most autotrophs use a process called photosynthesis to make their food.
2. Carbon Dioxide and water are the raw material for photosynthesis.
3. This is a trick question because nitrogen is part of oxygen, so the answer is definitely oxygen.
Hope this helps! :)
 
        
                    
             
        
        
        
Answer:
Hybrids are the offspring of two species. A mule is the hybrid offspring of a female horse and male donkey. Because mules are sterile, they are not classified as a distinct species. The biological species concept connects the idea of a species to the process of evolution.