Answer:
The First and Third one for sure
Explanation:
Carnivores eat primary consumers as well as other carnivores if I'm not wrong, which would make them secondary or higher consumers. 
Also, herbivores eat producers, which are plants and stuff and basically organisms that make their own food, which would make them primary consumers.
 
        
             
        
        
        
Classical biotechnology dates back about 100, 000 years ago.
        
                    
             
        
        
        
I am confident that the answer should be.....<span>A protein acts as a pump and moves calcium ions from an area of low concentration to an area of high concentration.
                                       Hope this helps.
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The combined mass of rock 1 and 2 = 19.28 + 25.3
= 44.58
Difference between rock 3 and combined rocks 
= 46.3 - 44.58
= 1.72 grams
therefore, the third rock was 1.72 grams greater than the combined mass of the other two rocks. 
        
             
        
        
        
Answer:
About 5billion years ago is the correct option.
Explanation:
Hope this will help you :)