Organisms that depend on other sources for food are called heterotrophs.
Answer:
In a cell signaling pathway EGF is a ligand which binds to EGFR which activates the receptor. The receptor initiates the cell signaling pathway. Celluar response iniates ceel division. Cell devision resluts in new cells that result in tissue repair.
Explanation:
The Scientific Revolution changed the perspective of many people in the world. Our universe was no longer the mystery that it once was. Some people were excited by these new discoveries and revelations while others were terrified of what they did not know and what it could do to their role in society.
Funding for social security. With more Americans retiring and claiming those benefits, and smaller generation of workers coming in to replace them, there are rightfully fears about its fate in the future. There will be fewer workers paying to fund the social security for a larger number of retirees. The main fear is that by the time the new generations, usually called X and Y, reach retirement age funding for the service may dry up because of so many baby boomers overwhelming their successors' ability to fund it.