LIFE SCIENCE

Detailed explanation-1: -Cells are the most basic unit of life at the smallest level of organization. The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere. The organism level is the highest level of organization.

Detailed explanation-2: -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-3: -The first and most basic level of organization is the cellular level.

Detailed explanation-4: -At a simple level, cells are membrane-bound structures that include smaller sub-structures or organelles.