B. New substances are formed. In a chemical reaction, the starting molecule must be changed or turn into another. For example: rusts that form in a tin can is a chemical reaction. The iron in the can combines with the oxygen in the atmosphere, creating rust (iron oxide), which is a different substance.
        
             
        
        
        
Answer:
<u>Chloroplast</u>
The chloroplast is where photosynthesis occurs in plant cells. During photosynthesis, sunlight energy, carbon dioxide, and water are converted into simple sugars (glucose). These simple sugars are cell's version of food.
<u>Mitochondria</u>
The mitochondria is where cellular respiration occurs. During the process of cellular respiration, glucose, which is produced through photosynthesis in the chloroplasts, is broken down into cellular energy that can be used by the cell.
- Both chloroplasts and mitochondria are organelles that generate metabolic energy.
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Approximately  10% of the stored energy of  an organism at  one level of a food web is transferred to the tissue of the organism that consumes it at the next level of the food web.
<h3>What is food web and its importance ?</h3>
A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is a part multiple food chains. The importance of food webs is to describe feeding relationship among species in a community. 
On an average only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next. 
to learn more about Food web click here 
brainly.com/question/2233704 
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How much energy does it take a bee to fly for 10 seconds
 
        
                    
             
        
        
        
Answer:
fibrous root because they form a wide network of thin roots that originate from the stem and stay close to the surface of the soil.