Answer:
The level of organization in order from largest to smallest is;
1. Biosphere
2. Ecosystem
3. Community
4. Population
5. Species
6. Organism
7. Organ system
8. Organ
9. Tissue
10. Cell
11. Organelle
12. Molecule
13. Atom
Explanation:
All living things on Earth are arranged in an hierarchical level of organization. The order in descending way is as follows:
1. Biosphere- Biosphere refers to the part of the Earth that constitutes all living organisms in interaction with their environment. It is the total of all ecosystems on Earth.
2. Ecosystem: Ecosystem refers to a group of living organisms i.e plant, animal and microbes interacting with each other and their abiotic environment e.g water, air etc. An ecosystem comprises of several communities.
3. Community- Community refers to a group of organisms interacting with each other at a particular time and habitat. A community is made up of two or more populations.
4. Population- Population refers to a group of organisms of the same species living together in the same habitat and capable of interbreeding.
5. Species- A species is a group of organisms usually with the same appearance and capable of producing fertile offsprings by interbreeding.
6. Organism- An organism is an individual living thing i.e. plant, animal, microbe. An organism is made up of several organ systems that work together to make it whole.
7. Organ system- Organ system refers to a group of organs working in an interconnected manner to perform certain functions in an organism.
8. Organ- An organ is a structure in an organism that performs a specific function.
9. Tissue- A tissue is a group of cells working together for the same purpose.
10. Cell- A cell is the basic and fundamental unit of life, which is the building block of all living organisms.
11. Organelles- An organelle is a specialized structure in a cell that performs specific functions. e.g. nucleus, mitochondria etc.
12. Molecule- A molecule is the smallest unit of a chemical compound responsible for the chemical identity of that compound. A molecule is made up of two or more atoms chemically bonded together.
13. Atom- An atom is smallest indivisible unit of mattter that partakes in chemical reactions. Atom is considered the smallest unit of matter.
