The image below represents a growing polypeptide chain. What does directionality refer to in terms of polypeptides? Label the image below accordingly.

How are carbon dioxide emissions affecting the earths natural cycle of temperature change? plz apex

Ture or false evidence for evolution includes millions of fossils

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.