.BIOLOGY.II

CHAPTER 24

OBJECTIVES

1. Provide at least two lines of evidence for the antiquity of life.

2. Describe the contributions that A.I. Oparin, J.B.S. Haldane, Stanley

Miller and Harold Urey made towards developing a model for abiotic

synthesis of organic molecules.

3. Provide plausible evidence to support the hypothesis that chemical

evolution resulting in life's origin occurred in four stages:

a. Abiotic synthesis of organic monomers.

b. Ablotic synthesis of polymers.

c. Formation of protobionts.

d. Origin of genetic information

4. Describe the basis for Whittaker's five‑kingdom system.

5. List and distinguish among the five kingdoms.

6. Give examples of representatives from each kingdom.

7. Describe three alternatives to the five-kingdom system and explain the rationale for each.