LATEST 2025/2026 Questions and Correct
Answers
1. Abiotic: Non-living, may be within or made by a living organism.
2. Biotic: Living. Matter is considered if it was ever alive at some point in
time
3. Atom: Smallest level. The basic unit of matter. Consists of a dense nucleus
surrounded by electrons.
4. Molecule: Second level. A chemical structure consisting of at least two atoms
held together by a chemical bond.
5. Macromolecule: Third level. Biologically important molecules that are technically
,polymers. Example: DNA.
6. Cell: Fourth level. The fundamental unit of life. Essentially a tiny droplet of water
and other molecules enclosed by a fluid "skin" or membrane. The smallest and
simplest entity that possesses all the characteristics of life.
7. Organelle: Fifth level. Compartments inside the cell that contain specific groups
of macromolecules and carry out specific cellular functions. One of these organelles
is the nucleus; it encloses the DNA within the cell.
8. Microorganism: Sixth level. Single-celled life form. Consists of just one cell and
include unicellular organisms such as bacteria and protists.
9. Tissue: Seventh level. Formed when similar cells work together to fulfill the same
detailed function.
10. Organ: Eighth level. Collections of tissues that work together to carry out a
common general function. Present not only in higher level animals but also in plants.
,11. Organ System: Ninth level. Consists of functionally related organs. Mammals
have many.
12. Organism: Tenth Level. Individual living entities that survive and reproduce as
a unit. For example, each tree in a forest.
13. Population: Eleventh level. Consists of all the individuals of a species living
within a specific area.
14. Community: Twelfth level. Populations can interact with each other in positive
and negative ways, and together they form this.
15. Ecosystem: Thirteenth level. Consists of all the living things in a particular area
together with the abiotic, or nonliving, parts of that environment.
16. Biosphere: Fourteenth level. The highest level of organization in living systems.
The collection of all ecosystems on Earth. Includes all habitable zones on the planet,
including land, soil, and rocks to a great depth in the Earth's crust; water and ice;
, and the atmosphere to a great height.
17. Emergent Properties: Characteristics of a system that are not present in any
of its component parts.
18. Biology: The scientific study of life and is the branch of science that studies
living organisms and the way organisms interact with their environments.