AP BIOLOGY

Detailed explanation-1: -The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

Detailed explanation-2: -The most complex level of organization is the organismal level, where all eleven organ systems function in the human organism, the whole living person.

Detailed explanation-3: -The biosphere is the most complex and inclusive level of organization that we have. It includes all ecosystems. The biosphere basically refers to all areas (oceans, atmosphere, land) where life on Earth is present.

Detailed explanation-4: -The organism level is the highest level of organization. An organism is a living being that has a cellular structure and that can independently perform all physiologic functions necessary for life.