A virus uses theon the outside of its body to unlock and enter our cells. This object on the outside is also known as an antigen and can be identified by the immune system to fight the virus in the future.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

What is the correct order of cell division? include what happens in each phase

As an asteroid comes close to earth, it's name will change to? apex