Question 1

Which of the following describes the order of emergence of various organisms on Earth?

Accepted Answer

A) land plants, first prokaryotes, animals, first eukaryotes, humans 
B) first prokaryotes, first eukaryotes, land plants, animals, humans 
C) animals, first prokaryotes, first eukaryotes, land plants, humans 
D) humans, animals, land plants, first eukaryotes, first prokaryotes 
A) land plants, first prokaryotes, animals, first eukaryotes, humans 
B) first prokaryotes, first eukaryotes, land plants, animals, humans 
C) animals, first prokaryotes, first eukaryotes, land plants, humans 
D) humans, animals, land plants, first eukaryotes, first prokaryotes

Question 2

The energy for the synthesis of organic molecules on primordial Earth came only from lightning.

Accepted Answer

A) True 
 B)False

Question 3

What is the name of the process by which mitochondria and chloroplasts probably evolved?

Accepted Answer

A) endocytosis 
B) endosymbiosis 
C) exocytosis 
D) exosymbiosis 
A) endocytosis 
B) endosymbiosis 
C) exocytosis 
D) exosymbiosis

Question 4

What is the importance of the Miller-Urey experiment?

Accepted Answer

A) It showed that molecules crucial to life could be produced biotically. 
B) It showed that molecules crucial to life could be produced abiotically. 
C) It showed that molecules not crucial to life could be produced biotically. 
D) It showed that molecules not crucial to life could be produced abiotically. 
A) It showed that molecules crucial to life could be produced biotically. 
B) It showed that molecules crucial to life could be produced abiotically. 
C) It showed that molecules not crucial to life could be produced biotically. 
D) It showed that molecules not crucial to life could be produced abiotically.

Question 5

If a condenser is analogous to the Miller-Urey experiment, which of the following is analogous to primordial Earth?

Accepted Answer

A) a primeval sea 
B) water vapour 
C) cold temperature 
D) lightning 
A) a primeval sea 
B) water vapour 
C) cold temperature 
D) lightning

Question 6

Compare contemporary cells and primitive cells with respect to oxidation-reduction reactions.

Accepted Answer

Oxidation-reduction reactions were proba

Question 7

If you were to prove that the RNA molecule was a component of the first cells, how would you do that?

Accepted Answer

This could be based on the fact that RNA

Question 8

Explain why DNA was favoured by selection as a much better way to store information than RNA.

Accepted Answer

DNA was favoured by selection for three

Question 9

What does the fact that seven attributes are shared by all life on Earth suggest?

Accepted Answer

It suggests that all

Question 10

Which of the following factors is the most important requirement in order for life to emerge?

Accepted Answer

A) the presence of liquid water 
B) the presence of air 
C) the presence of soil 
D) the presence of sunlight 
A) the presence of liquid water 
B) the presence of air 
C) the presence of soil 
D) the presence of sunlight

Question 11

Which of the following statements does NOT describe prokaryotic cells?

Accepted Answer

A) They are ten times smaller than typical eukaryotic cells. 
B) They vastly outnumber all other types of organisms. 
C) They are less versatile biochemically than eukaryotes. 
D) They have much less internal membrane organization than eukaryotes. 
A) They are ten times smaller than typical eukaryotic cells. 
B) They vastly outnumber all other types of organisms. 
C) They are less versatile biochemically than eukaryotes. 
D) They have much less internal membrane organization than eukaryotes.

Question 12

Explain the seven characteristics shared by all life-forms.

Accepted Answer

These are: 1. Display order (all forms o

Question 13

From which of the following processes did the first oxygen molecules come from?

Accepted Answer

A) aerobic respiration 
B) anaerobic respiration 
C) the oxidization of water 
D) the reduction of water 
A) aerobic respiration 
B) anaerobic respiration 
C) the oxidization of water 
D) the reduction of water

Question 14

What is the difference between a unicellular organism and a multicellular organism (other than the actual number of cells)?

Accepted Answer

Unicellar organisms have only

Question 15

Important molecules that were present in the reducing atmosphere of primordial Earth were oxygen (O2), hydrogen (H2), and methane (CH3).

Accepted Answer

A) True 
 B)False

Question 16

Explain how the discovery of ribozymes revolutionized our thinking about the origin of life.

Accepted Answer

Instead of the contemporary system that

Question 17

Explain how we can be confident that stromatolites were formed by microbial activity.

Accepted Answer

Modern-day stromatolites exist

Question 18

What are protobionts?

Accepted Answer

A) a group of abiotically produced organic molecules surrounded by a membranelike structure 
B) a group of biotically produced inorganic molecules surrounded by a membranelike structure 
C) a group of biotically produced organic molecules surrounded by a membranelike structure 
D) a group of abiotically produced inorganic molecules surrounded by a membranelike structure 
A) a group of abiotically produced organic molecules surrounded by a membranelike structure 
B) a group of biotically produced inorganic molecules surrounded by a membranelike structure 
C) a group of biotically produced organic molecules surrounded by a membranelike structure 
D) a group of abiotically produced inorganic molecules surrounded by a membranelike structure

Question 19

Today's atmosphere is an oxidizing atmosphere. The presence of oxygen allows complex molecules to be formed because oxygen is a strong oxidizing molecule.

Accepted Answer

A) True 
 B)False

Exam 3: Defining Life and Its Origins

Which of the following describes the order of emergence of various organisms on Earth?

The energy for the synthesis of organic molecules on primordial Earth came only from lightning.

What is the name of the process by which mitochondria and chloroplasts probably evolved?

What is the importance of the Miller-Urey experiment?

If a condenser is analogous to the Miller-Urey experiment, which of the following is analogous to primordial Earth?

Compare contemporary cells and primitive cells with respect to oxidation-reduction reactions.

If you were to prove that the RNA molecule was a component of the first cells, how would you do that?

Explain why DNA was favoured by selection as a much better way to store information than RNA.

What does the fact that seven attributes are shared by all life on Earth suggest?

Which of the following factors is the most important requirement in order for life to emerge?

Which of the following statements does NOT describe prokaryotic cells?

Explain the seven characteristics shared by all life-forms.

From which of the following processes did the first oxygen molecules come from?

What is the difference between a unicellular organism and a multicellular organism (other than the actual number of cells)?

Important molecules that were present in the reducing atmosphere of primordial Earth were oxygen (O2), hydrogen (H2), and methane (CH3).

Explain how the discovery of ribozymes revolutionized our thinking about the origin of life.

Explain how we can be confident that stromatolites were formed by microbial activity.

What are protobionts?

Today's atmosphere is an oxidizing atmosphere. The presence of oxygen allows complex molecules to be formed because oxygen is a strong oxidizing molecule.

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Control of Gene Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

Filters

Important molecules that were present in the reducing atmosphere of primordial Earth were oxygen (O₂), hydrogen (H₂), and methane (CH₃).