Answer: A, through extensive testing and the accumulation of several lines of evidence 
Explanation:
 
        
             
        
        
        
Photosynthetic organisms, also known as photoautotrophs, are organisms that are capable of photosynthesis. Some of these organisms include higher plants, some protists (algae and euglena), and bacteria.
 
        
                    
             
        
        
        
Answer:
Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
 
        
             
        
        
        
From the given clauses and phrases, the independent clause can stand alone as a complete sentence while the dependent clause can not.
<h3>What are clauses?</h3>
Clauses are groups of words that contain a subject and a verb that are related together.
Clauses can be dependent or independent clauses. 
A phrase is a group of words that do not contain a subject but may contain a verb.
Based on the given options:
- The independent clause is scientists create this plants and animals through genetic engineering. 
- The dependent clause is " so that people can choose whether or not to consume these foods".
- The infinitive phrase is "to consume these foods "
- The gerund phrase is "the labelling of these foods".
Therefore, the independent clause can stand alone while the dependent clause can not.
Learn more about clauses at: brainly.com/question/798413