Prokaryotic cells possess simpler structures than eukaryotic cells , since they do not have a nucleus , other membrane bound organelles , or a cytoskeleton . Bacterial cells have two major compartments, the cytoplasm and cell envelope, and may also have exterior appendages , such as flagella or pili. There are two major types of prokaryotes: bacteria and archaea.
A , Administration, answered. The first symptoms of influenza (flu) virus B, including fever, chills, headache, and body aches, often begin to go away after about 2 or 3 days. In some cases, these symptoms will last 5 days or longer. The respiratory symptoms of influenza virus B, such as coughing, throat irritation, and congestion may last for days or weeks. However, most people are not contagious after about a week from the beginning of symptoms.
Skewed expectations may be one reason why antibiotics are over-prescribed, even for viral infections. In a phone survey, researchers asked 493 people how long they thought a case of ACI (acute cough illness, a.k.a. a cold that causes coughing) should last. At the same time, they looked at the existing medical literature to see how long ACI actually lasts on average. Survey respondents guessed that a cough should last 7-9 days. The literature, by contrast, showed that the mean duration of a cough is almost 18 days. Advertisement.