BIO CHAPTER 1

Why are viruses not considered to be living organisms?

Viruses do not have their own cells and they do not reproduce on their own.

A(n) ____ involves running a test multiple times while changing one variable, leaving the others the same.

controlled experiment

A(n) ____ is a proposed explanation for a set of observations. It leads to predictions that can be tested by additional observations or by experiments.

hypothesis

A cardiologist is a physician that treats diseases of the heart and blood vessels that supply the heart with oxygen. What level of biology is cardiology?

organ system

Scientists use a general process known as the ____ to ask and answer questions about nature.

scientific method

4. A(n) _____ is broader in scope than a hypothesis, is supported by a large body of evidence, and generates many new hypotheses.

theory

Steps of the scientific method in order

1. Observation 2. Question 3. Hypothesis 4. Prediction 5. Experiment

Property of all LIVING things

1. Reproduces its own kind 2. Takes in, converts and expels energy 3. Responds to the environment 4. composed of one or more cells 5. populations evolve over time 6. complex, but well-ordered structure

Can you sequence the following levels of biological organization from smallest to largest?

1. atom 2. molecule 3. organelle 4. cell 5. tissue 6. organ 7. organ system 8. organism 9. population 10. community 11. ecosystem 12. biosphere