Cellular respiration is the process of synthesizing cellular energy (ATP) from organic sources such as water, glucose and oxygen. These substances are processed through a series of steps in order to produce ATP. The main organelle responsible for ATP synthesis is the mitochondria. 
<span>In plants, the photosynthetic pigment, chlorophyll, is found within chloroplasts. The process of photosynthesis is driven by light and carbon dioxide from the environment, converting these into glucose, water and energy. </span>
<span>photosynthesis occurs in chloroplasts </span>
<span>cellular respiration occurs in mitochondria</span>
        
             
        
        
        
Answer:
d. endocytosis and exocytosis
 
        
             
        
        
        
Explanation:
More than a century ago, the first fossils were discovered in Antarctica. During the expedition to the Pole
 
        
             
        
        
        
Carbon compounds regulate the Earth's temperature, make up the food that sustains us, and provide energy that fuels our global economy. Most of Earth's carbon is stored in rocks and sediments. The rest is located in the ocean, atmosphere, and in living organisms. These are the reservoirs through which carbon cycles.
        
             
        
        
        
Answer:
D 
Explanation:
to find out how biological molecules could have first formed