The smallest unit of biological structure that meets the functional requirements of “living” is the ________.

1. organ
2. organelle
3. cell
4. macromolecule

Which of the following sequences represents the hierarchy of biological organization from the most complex to the least complex level?

1. organelle, tissue, biosphere, ecosystem, population
2. organ, organism, tissue, organelle, molecule
3. organism, community, biosphere, molecule, tissue, organ
4. biosphere, ecosystem, community, population, organism

A suggested and testable explanation for an event is called a ________.

1. hypothesis
2. variable
3. theory
4. control

The type of logical thinking that uses related observations to arrive at a general conclusion is called ________.

1. deductive reasoning
2. the scientific method
3. hypothesis-based science
4. inductive reasoning