<span>Basically, the body needs to know what it is defending against. Your body can still (usually) fight off infection, even without an immunization, but it takes longer. Basically, your body creates cells with a receptor for a specific disease. When this cell finds the disease it is programmed for, it will send out signals to the "killer" cells to come and kill it. If your body doesn't have the "seeker" cells, it can't fight off the infection until it does. The opposite end are autoimmune diseases, where your immune system starts attacking itself.
brainlest answer</span>
D because the offspring genetics are more limited due to separation
Low pressure- Where the air pressure is below average
High pressure- Where the air pressure is above average
The biologist determined that archaea and Bacteria are not closely related because their DNA are very different. According to research they classified archaea as becteria beforehand, however this research is no longer updated and valid.
