Rewrite 'The mucus in your bronchi normally traps the pathogens you inhale. Cilia then waft the trapped pathogens up your trachea. The tar fron cigarette smoke paralyses the cilia and leaves trapped pathogens in your lungs where they can cause infections.' to make it clearer​

What are the four basic classes of organic molecules how do they differ structurally and functionally

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.