The answer would be yeast
He developed and improved the microscope. He was also the first to discover single-cell organisms that he called animalcules.
Auditory deals with the sense of hearing and all of the choices start with a different external factor end in a logical response, however, B is the answer because it’s external factor, a siren, is the only one that involves the sense of hearing.
Larger animals would die off because there wouldn't be enough food to support them |||||| the most harmful one was D
1. all living things are made up of one or more cells.
2. cell is the simplest unit
3. all cells come from other living cell.