You have a community of organisms that depend on a limited amount of resources, including other organisms as food. What would happen if any of these
resources were to be removed from the ecosystem?

The community would start to fall apart. For example, with no flowers, there are no bees. With no sun, there are no flowers.

Another example is if there are no fish, there is nothing for the bears to eat. No bears, and the bunnies and other small animals would overpopulate.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).