B) vasopressin and oxytocin
<span>The correct answer is B. 0.5 km. That is because if you convert them all to meters you will see that 0.5 km is 500 meters. 50 meters is smaller than that, while 50000 millimeters is actually 50 meters in size. 5000 centimeters is also 50 meters when converted. Half a kilometer is 500 meters which is 10 times larger than all others.</span>
THE NASAL CAVITY IS A HOLLOW SPACE WITHIN THE NOSE AND SKULL THAT IS LINED WITH HAIRS AND MUCUS. THE FUNCTION INTO WARM, MOISTURIZE, AND FILTER AIR ENTERING THE BODY BEFORE IT REACHES THE LUNGS
It is absolutely true that you can be infected by a virus and not even know it. Some of the known viruses can remain dormant for a long time. During this phase it is not possible for a human being to know that the virus has already entered the body. It is sometimes also called the gestation period. When the virus comes out of this dormant period, then only it is possible for the human beings to know that they have been attacked by a virus. Sometimes this late discovery can be very fatal and even lead to death. This dormant form of virus is very difficult to initially understand.
