Arrange the following levels of biologic organisation in an ascending order : atom, cell, community, ecosystem, individual, molecule, organ, organelle, population, species, tissue.

Explanation

To arrange the levels of biological organization in ascending order, we need to start from the smallest unit and move to the largest. Here’s the step-by-step solution:

1. **Atom**: The smallest unit of matter, which forms the basic building blocks of all substances.

2. **Molecule**: A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

3. **Organelle**: Structures within a cell that perform specific functions, composed of molecules.

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