Question 1

The age of the Earth according to modern estimations is aboutrev: 02_12_2014_QC_45114

Accepted Answer

A) 8 billion years. 
B) 4.6 billion years. 
C) 3.5 billion years. 
D) 1.5 billion years. 
A) 8 billion years. 
B) 4.6 billion years. 
C) 3.5 billion years. 
D) 1.5 billion years.

Question 2

All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others, except for

Accepted Answer

A) amino acids. 
B) organic molecules. 
C) prokaryotes. 
D) hydrogen cyanide. 
A) amino acids. 
B) organic molecules. 
C) prokaryotes. 
D) hydrogen cyanide.

Question 3

Why have plants been implicated in the Ordovician and Devonian glaciations, but not the Proterozoic glaciations?

Accepted Answer

A) Proterozoic plants used anoxygenic photosynthesis. 
B) Proterozoic plants had simple root structures that did not increase rock weathering. 
C) Land plants had not yet evolved during the Proterozoic. 
D) The non-vascular plants present during the Proterozoic did not contribute to global nutrient cycles. 
A) Proterozoic plants used anoxygenic photosynthesis. 
B) Proterozoic plants had simple root structures that did not increase rock weathering. 
C) Land plants had not yet evolved during the Proterozoic. 
D) The non-vascular plants present during the Proterozoic did not contribute to global nutrient cycles.

Question 4

It has been discovered that enzyme-like catalysis can be carried out not only by enzymes but also by

Accepted Answer

A) sugars. 
B) DNA. 
C) phospholipids. 
D) RNA. 
A) sugars. 
B) DNA. 
C) phospholipids. 
D) RNA.

Question 5

Imagine that NASA discovered a new planet with an atmosphere rich in hydrogen gas, hydrogen sulfide, ammonia and methane.We would call this a(n)

Accepted Answer

A) reducing atmosphere, because of the availability of hydrogen atoms that can donate electrons. 
B) reducing atmosphere because the atmosphere would reduce the energy necessary to build molecules. 
C) oxidizing atmosphere because of the availability of oxygen compounds. 
D) oxidizing atmosphere because of the lack of oxygen gas. 
A) reducing atmosphere, because of the availability of hydrogen atoms that can donate electrons. 
B) reducing atmosphere because the atmosphere would reduce the energy necessary to build molecules. 
C) oxidizing atmosphere because of the availability of oxygen compounds. 
D) oxidizing atmosphere because of the lack of oxygen gas.

Question 6

Infolding of the cellular membrane has led to the development of the

Accepted Answer

A) chloroplast 
B) mitochondria 
C)  nuclear envelope 
D) nucleolus 
A) chloroplast 
B) mitochondria 
C)  nuclear envelope 
D) nucleolus

Question 7

What is the advantage of having cyanobacteria living inside a cell?

Accepted Answer

A) Enhanced protection of DNA 
B) Intracellular production of glucose 
C) Much more efficient protein synthesis 
D) Allows the cell to manufacture ATP 
A) Enhanced protection of DNA 
B) Intracellular production of glucose 
C) Much more efficient protein synthesis 
D) Allows the cell to manufacture ATP

Question 8

In the original experiments by Stanley Miller and Harold Urey to synthesize organic molecules in an abiotic environment, which one of the following would you NOT expect to find in the collection flask?

Accepted Answer

A) urea 
B) amino acids 
C) ATP 
D) adenine 
A) urea 
B) amino acids 
C) ATP 
D) adenine

Question 9

The oldest fossils of eukaryotes have been estimated to be

Accepted Answer

A) 6000 years old. 
B) 8 billion years old. 
C) 4.5 billion years old. 
D)  1.5 billion years old. 
A) 6000 years old. 
B) 8 billion years old. 
C) 4.5 billion years old. 
D)  1.5 billion years old.

Question 10

Which eon would contain rocks with no fossils?

Accepted Answer

A) Archean 
B) Hadean 
C) Proterozoic 
D) Phanerozoic 
A) Archean 
B) Hadean 
C) Proterozoic 
D) Phanerozoic

Question 11

Which of the following was demonstrated by the Miller-Urey experiment?

Accepted Answer

A) Life began in the oceans. 
B) Life can be started experimentally in the laboratory. 
C) Organic molecules important to life could have been formed from a vast array of simple chemicals. 
D) Life began on the pre-biotic Earth 3.5 billion years ago. 
A) Life began in the oceans. 
B) Life can be started experimentally in the laboratory. 
C) Organic molecules important to life could have been formed from a vast array of simple chemicals. 
D) Life began on the pre-biotic Earth 3.5 billion years ago.

Question 12

Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years.Multicellular eukaryotes have only been around for about 25% of earth's history

Accepted Answer

A) True 
 B)False

Exam 26: The Origin and Diversity of Life

The age of the Earth according to modern estimations is aboutrev: 02_12_2014_QC_45114

All of the following were produced in experiments on primitive Earth conditions conducted by Miller-Urey and others, except for

Why have plants been implicated in the Ordovician and Devonian glaciations, but not the Proterozoic glaciations?

It has been discovered that enzyme-like catalysis can be carried out not only by enzymes but also by

Imagine that NASA discovered a new planet with an atmosphere rich in hydrogen gas, hydrogen sulfide, ammonia and methane.We would call this a(n)

Infolding of the cellular membrane has led to the development of the

What is the advantage of having cyanobacteria living inside a cell?

In the original experiments by Stanley Miller and Harold Urey to synthesize organic molecules in an abiotic environment, which one of the following would you NOT expect to find in the collection flask?

The oldest fossils of eukaryotes have been estimated to be

Which eon would contain rocks with no fossils?

Which of the following was demonstrated by the Miller-Urey experiment?

Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years.Multicellular eukaryotes have only been around for about 25% of earth's history

The Science of Biology

The Nature of Molecules and the Properties of Water

The Chemical Building Blocks of Life

Cell Structure

Membranes

Energy and Metabolism

How Cells Harvest Energy

Photosynthesis

Cell Communication

How Cells Divide

Sexual Reproduction and Meiosis

Patterns of Inheritance

Chromosomes, Mapping, and the Meiosis-Inheritance Connection

Dna: the Genetic Material

Genes and How They Work

Control of Gene Expression

Biotechnology

Genomics

Cellular Mechanisms of Development

Genes Within Populations

The Evidence for Evolution

The Origin of Species

Systematics, Phylogenies, and Comparative Biology

Genome Evolution

Evolution of Development

Viruses

Prokaryotes

Protists

Seedless Plants

Seed Plants

Fungi

Animal Diversity and the Evolution of Body Plans

Protostomes

Deuterostomes

Plant Form

Transport in Plants

Plant Nutrition and Soils

Plant Defense Responses

Sensory Systems in Plants

Plant Reproduction

The Animal Body and Principles of Regulation

The Nervous System

Sensory Systems

The Endocrine System

The Musculoskeletal System

The Digestive System

The Respiratory System

The Circulatory System

Osmotic Regulation and the Urinary System

The Immune System

The Reproductive System

Animal Development

Behavioral Biology

Ecology of Individuals and Populations

Community Ecology

Dynamics of Ecosystems

The Biosphere

Conservation Biology

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