Changes in a DNA sequence that affect genetic information are known as mutations.
Your answer would be C.It encloses the cytoplasm.
They are considered so because are the indispensable parts of the nature cycle.Without formation,decay cannot be possible and similarly,formation cannot be possible without decay.In addition to this,THEY ARE IN A CHRONOLOGICAL MANNER SET BY NATURE and that's why cannot be seperated and so together constitute the cycle of nature.
Based on the CDC Article There were about 300 species of birds infected by the west Nile virus in Florida. good luck:)
