Answer:
It is a common condition that includes overgrowth of atypical bacteria in the vagina 
Explanation:
It is characterized by vaginal discharge that is when a fluid flows out from the vaginal opening with an abnormal odor or consistency and sometimes pain, the normal microflora of the  female reproductive organs includes Gardenella, lactobacillus, Bacteroides, peptostreptococcus, fusobacterium , eubacterium, as well as a  number of other types, some of the factors that may contribute to an abnormal increase of these bacteria or  make them become unbalanced can be multiple or new sexual partners although some experts are skeptical about this; IUDs , recent antibiotic use, vaginal douching, and smoking. It is not dangerous but can cause discomfort symptoms.
 
        
             
        
        
        
Answer:
c
Explanation:
it is older because it was buried deeper than the fossil in layer d
 
        
                    
             
        
        
        
Answer:
No, CREs usually don't account for differences in gene expression levels.
Explanation:
<em>Cis</em>-regulatory elements (CREs) are non-coding DNA regions that regulate adjacent gene <em>transcription</em>. They usually do it by binding to transcription factors. They are in charge of influencing the rate of which transcription occurs, and less with how much a gene is expressed. On the other hand, trans-regulatory elements are DNA sequences that encode for upstream regulators that can modify or regulate <em>gene expression levels</em>.
Therefore, cis elements are not really in charge of expression levels, mostly transcription rates of single genes, rather. Trans elements are more involved in expression levels.
 
        
             
        
        
        
Answer:
The regulation of an internal environment is called homeostasis.
Explanation:
Homeostasis is when you can maintain a stable inner environment.