When a cold front happens when speaking gusty, there is a sudden drop in temperature, and there is heavy rain. When warm front approaches, The air becomes noticeably warmer and more humid than it was before.
<span>The macrophage is the cell responsible for detecting, engulfing and destroying pathogens and apoptotic cells. These cells process and present antigens (foreign materials) to immunocompetent cells and thus they are the key mediators in the development of all immune reactions.</span>
Answer: B
Explanation:
Evolution is a process of elimination. the traits that are successful and help them survive are kept for the next population, because they are abet o survive to repopulate. So its improvement.
