Question 1

The Soviet chemist Oparin suggested that for organic molecules to form on Earth,the atmosphere was probably rich in:

Accepted Answer

A) Oxygen 
B) Oxygen and water 
C) Helium 
D) Argon 
E) Hydrogen

Question 2

The last shared ancestor for today's cell types is thought to have arisen about:

Accepted Answer

A) Six billion years ago 
B) Four billion years ago 
C) Four million years ago 
D) Three billion years ago 
E) Three million years ago

Question 3

Based on DNA sequence analysis,humans and chimps have 96% of their DNA sequences alike,with 99% of the coding regions alike.The biggest differences between the sequences of chimps and humans are in which of the following?

Accepted Answer

A) Regions are transcribed into proteins 
B) All regions are equally different 
C) Regions that do not encode proteins 
D) Regions that are transcribed into RNA 
E) DNA found outside of the chromosomes

Question 4

Natural selection would have favored progenotes that could use more diverse food sources.

Accepted Answer

A) True 
 B)False

Question 5

Humans and chimps are both able to:

Accepted Answer

A) Walk upright 
B) Walk upright and use tools 
C) Communicate 
D) Use tools and communicate 
E) Use tools

Question 6

A buried skeletal find has the foramen magnum near but not at the rear of the skull; this indicates the skeletal remains may be those of:

Accepted Answer

A) A human 
B) A gorilla 
C) A dog or a gorilla 
D) A gorilla or a human

Question 7

Stanley Miller's first prebiotic simulation experiment showed that under the right conditions,Oparin's ancient atmosphere could allow for the formation of:

Accepted Answer

A) Living cells 
B) Amino acids 
C) Plants 
D) DNA molecules 
E) Liposomes

Exam 14: The Origin and History of Life