Chapter 1

Question 1

Properties of ALL cells (3)

Answer 1

1. Compartmentalization and Metabolism
2. Growth
3. Evolution

Question 2

Properties of SOME cells (3)

Answer 2

1. Motility
2. Differentiation
3. Communication

Question 3

How did evolution of cyanobacteria change the earth?

Answer 3

• Cyanobacteria produces O2 via photosynthesis
• Their evolution resulted in oxygenation of atm
• Allowed evolution of multicellular organisms

Question 4

What are Koch’s Postulates? (Generally)

Answer 4

A set of criteria for linking a specific disease to a specific microorganism

Question 5

What are Koch’s Postulates? (4)

Answer 5

1. The microorganism must be present in all animals with the disease and absent from all healthy animals
2. The microorganism must be isolated from a diseased animal and grown as a pure culture
3. The microorganism must cause the disease when inoculated into healthy animals
4. The microorganism must be re-isolated from the newly infected from 3 and grown as pure sample that is identical as that in 2

Question 6

How are Koch’s Postulates still relevant today?

Answer 6

• Proved that diseases are caused by microorganism
• obtaining pure cultures in lab
• identifying agents of diseases when suitable animal models are available