HORTICULTURE

Detailed explanation-1: -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 major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism. See below Figure 1.1.

Detailed explanation-3: -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-4: -The first and most basic level of organization is the cellular level. A cell is the basic unit of life and the smallest unit capable of reproduction. While cells vary greatly in their structure and function based on the type of organism, all cells have a few things in common.

Detailed explanation-5: -Answer and Explanation: The order of structures from least complex to most complex: cell, tissue, organ, organ system.