1. Challenge Questions

2. Challenge 1.Which word describes the energy in an exergonic reaction?
Created
Released
Absorbed
Destroyed

3. Challenge
2.Which theory is based on the work of Louis Pasteur and is central to the practice of modern medicine?
Cell theory
Germ theory
Evolutionary theory
Chromosome theory

4. Challenge
3.The H1N1 Virus, commonly known as the swine flu, was declared a pandemic by the World Health Organization in
Which approach is most effective in preventing the spread of the virus?
Vaccination
Sterilization
Use of antibiotics
Use of fungicides

5. Challenge
4.What process best explains how a nerve cell and a muscle cell can both develop from the same fertilized egg?
Differentiation
Natural selection
Selective breeding
Genetic engineering

6. Challenge
5.What is the best explanation for the continual changes in the classification system of organisms?
All organisms struggle for existence and become extinct.
All organisms compete to be at the top of the food chain.
Technological advances have allowed scientist to better compare organisms.
More species have been discovered, but scientists have not analyzed all the data.