Is the name given to a structure external to and bound tightly to the cell wall?

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

What pattern of migration do whales follow?

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.