5 Questions
What is the smallest unit of matter that cannot be broken down into anything simpler by chemical means?
Atom
Which of the following is a specialized structure that performs important cellular functions within cells?
Organelles
What is the basic unit of life, consisting of living matter enclosed by a barrier that separates it from its surroundings?
Cell
Which of the following is NOT a subatomic particle that makes up an atom?
Molecule
What is the hierarchy that presents the simplest to the complex biological levels?
Levels of Biological Organization
Test your knowledge of the different levels of biological organization, from subatomic particles to the biosphere. Learn about the hierarchy and complexity in biological systems.
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