Answer:
When the rider is at the top of the roller coaster.
 
        
                    
             
        
        
        
Answer:
the right answer is not aviable at this time
Explanation:
 
        
             
        
        
        
<u>Cellular respiration</u> is the process by which cells in plants and animals break down sugar and turn it into energy, which is then used to perform work at the cellular level. 
Explanation: In simpler words, it provides energy for the cell to do basic needs.
 
        
             
        
        
        
Answer: Just did the lesson on this, the answer is  C.
Explanation:An allele is one of the possible forms of a gene. Most genes have two alleles, a dominant allele and a recessive allele. If an organism is heterozygous for that trait, or possesses one of each allele, then the dominant trait is expressed. ... So a gene is a particular region of your DNA that controls a specific trait.
 
        
             
        
        
        
Answer:
When the positive and negative charges grow large enough, a giant spark - lightning - occurs between the two charges within the cloud. This is like a static electricity sparks you see, but much bigger. Most lightning happens inside a cloud, but sometimes it happens between the cloud and the ground.
Explanation: