Answer:
<u>Statement no 1 is true</u>. A primary response occurs when an antigens invades the body for the first time. B cells and T cell are activated to generate a response.
<u>Statement no 2 is true</u>, the B cells form plasma cells and memory cells during a primary response.
<u>Statement 3 is false</u>. A secondary response is faster than the primary response. When a pathogen invades the body again, the immune system already has memory cells for this pathogen. These memory cells will generate a quick response.
<u>Statement no 4 is true</u>. During a secondary response, the plasma cells will make more plasma cells and will also make memory cells as the pathogen might invade again.
Lichens use chemicals to break down rocks, which will turn into soil.
Junior College
Junior college is a 2-year institution. This is where you go to get a 2- year associate degree.
