A(n) is made up of all the species that live in the same
ecosystem at the same time.

All the organisms of the same species that live in the same place at the same time are a population. Populations ofspecies that live in the same place at thesame time together make up a community. All the populations and the nonliving components in an environment that interact with each other form anecosystem.

increased stability in the completion of fluorine's outer shell.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.