Answer:
Explanation:
An unfertilized egg is shed from the body during menstruation.  The lining of the uterus become thicker, getting ready in case of pregnancy.
It is not a fun experience :(
 
        
             
        
        
        
I think the correct answer from the choices listed above is option B. A gene is a tightly coiled strands of DNA. A gene is the basic unit of heredity and is made up of DNA. It acts as instructions to make molecules. Hope this answers the question.
        
             
        
        
        
The wolf exhibits caution and fear, because it now knows that attacking porcupines will result in getting stung by quills.
        
                    
             
        
        
        
Scientists change the names of taxonomic groups to match the current nomenclature is probably NOT a reason for these changes.
Scientists change the names of taxonomic groups to match current nomenclature.
<u>Explanation:</u>
There are various main reasons why taxonomists from time to time require or choose, to modify the name of an organism such as a plant. Initially, the naming of plants is treated by a set of laws ( the International Code of Botanical Nomenclature ) which sets out how to accurately name plants and how to solve cases where two or more names have been used for one species. 
It seldom happens that applying the rules requires us to change a name. For example, if a species named by one botanist turns out to have been before legitimately named by an elder botanist.
 
        
             
        
        
        
One way is that the bacteria that lives in your intestine help you digest. Ususally things in your intestine that the human body can't breaking it down along with the other food. Also meaning that that bacteria also aids in taking in nutrients. 
The second way bacteria can also help you get over an illness. The bacteria in your immune system fight the bacteria that is making you sick and gets rid of it. 
 Hoped that helped