Question

Biological organisation begins at
A. Cellular level
B. Atomic-level
C. Organism level
D. Submicroscopic molecular level.

Answer 1

Hint: Biological organisation is a process of forming a complete system of living organisms from lower hierarchy to higher hierarchy where it forms a complete organism.

Complete answer:
Levels of the organisation are structures in nature, usually defined by part-whole relationships, with things at higher levels being composed of things at the next lower level. The biological organization starts with the “submicroscopic molecular level” and goes phase by phase.

Typical levels of organization that one finds in the literature include the atomic, molecular, cellular, tissue, organ, organismal, group, population, community, ecosystem, landscape, and biosphere levels. A biological organisation starts with the sub-microscopic molecular level, passes through the microscopic cellular level and microscopic or macroscopic organismic level and ends in ecosystems and biosphere. The hierarchies of a biological organisation reveal that atoms are the lowest unit at the molecular level while the cells are the smallest unit at the microscopic level. Atoms join to form the molecule. But It is from the molecules like carbohydrates, lipids, proteins and nucleic acids, the organelles are formed.

Note: Biological evolutionary theory is ontologically committed to the existence of nested hierarchies in nature and attempts to explain natural phenomena as a product of complex dynamics of real hierarchical systems.