<u>Answer</u>: Natural selection.
<u>Explanation</u>:
- The concept of <em>natural selection</em> was given by <em>Charles Darwin.</em>
- According to this concept, in a given environment the organisms that possess <em>better adaptations</em> have<em> higher chances of survival</em> and, leave behind a <em>greater number of progenies</em>.
- When malaria outbreak occurs, the allele frequencies change and only the organisms that possess the alleles which help them to <em>survive</em> this outbreak due to resistance against malarial infection will be selected by nature and<em> hence, this is an example of natural selection.</em>
 
        
                    
             
        
        
        
Whenever the sperm and the egg combine, it is possible for one or the other to not split properly and bring 2 of the chromosomes instead of just 1
        
             
        
        
        
Explanation:
after a main glucose and the liver and level of blood glucose rise this successful course is guilt with by the glucose lenses which is the liver Converse glucose into glycogen for storage the glucose that is not stole is used to produce energy by a process called glycolysis 
 
        
             
        
        
        
The answer is C.) Sac. More formally known as the amniotic sac. It's also sometimes called the bag of waters. 
        
                    
             
        
        
        
Answer:
crude oil (petroleum) is the only natural liquid fossil fuel