BIO 211- IOWA STATE UNIVERSITY
BIEDERMAN EXAM 1
85+ (Latest 2026 Edition) 100% Verified Q&A + Answer Key Solutions
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 85 Qs
This document, "BIO 211- Iowa State University Biederman Exam 1," specifically covers topics such as the
definition of life, evolution, cellular life, multicellularity, and molecular biology, including archaea, bacteria,
and eukarya. It provides a comprehensive review of biology concepts, with 85 questions and their
corresponding correct answers, accompanied by detailed explanations and rationales. This resource allows
students to study, review, and understand these biology concepts more effectively, enabling them to
reinforce their knowledge and prepare for exams in introductory biology courses.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
Scientific theories are just "ideas" (T/F)
CORRECT ANSWER
false
RATIONALE: Scientific theories are not merely subjective ideas, but rather well-substantiated explanations for a set of
phenomena, supported by a large body of evidence and consistently tested through experimentation and observation. This
rigorous process of testing and validation distinguishes scientific theories from mere ideas or hypotheses.
Trusted by thousands of students and professionals worldwide Page 1 of 31
, QUESTION 2
What is NOT considered a quality within the definition of life?
Living things evolve
Living things can grow and develop
Living things are sentient
Living things use energy
CORRECT ANSWER
Living things are sentient
RATIONALE: Being sentient refers to having the capacity for subjective experience, emotions, and consciousness, which is
not a necessary or universally required characteristic among all living organisms. This means that there are some living
things, such as single-celled organisms like bacteria, that do not possess sentience, making it a quality that is not
universally applicable to all living things within the definition of life.
QUESTION 3
In some cases an observational study is more appropriate than an experiment. (T/F)
CORRECT ANSWER
True
RATIONALE: In some cases, an observational study is more appropriate than an experiment because it allows researchers
to explore real-world phenomena and relationships without artificially manipulating variables, which can be impractical or
unethical. For example, studying the long-term effects of a naturally occurring environmental disaster or the outcomes of a
common medical procedure can provide valuable insights and knowledge in a way that an experiment cannot.
QUESTION 4
The oldest fossils humans have discovered are from organisms called________.
CORRECT ANSWER
stromatolites
RATIONALE: Stromatolites are the oldest fossils discovered by humans because they are layered structures formed by
ancient microbial communities, with evidence of their existence dating back over 3.5 billion years to the Precambrian era.
The preservation of these structures in rocks provides a direct record of early life on Earth, making them the oldest known
fossils that have been discovered.
Trusted by thousands of students and professionals worldwide Page 2 of 31
, QUESTION 5
Extant means this species still lives on earth. (T/F)
CORRECT ANSWER
True
RATIONALE: The term "extant" specifically refers to a species or organism that currently exists and is alive on Earth, which
means it has not become extinct. In this context, the concept of "extant" is used to indicate the presence and survival of a
species over time, which aligns with the idea that it still lives on Earth.
QUESTION 6
Put the 5 major steps in the history of life on earth in order:
CORRECT ANSWER
1. cellular life
2. oxygen revolution
3. nucleated cells
4. multicellularity
5. Cambrian explosion
RATIONALE: The correct order reflects the major milestones in the evolution of life on Earth, starting with the emergence
of cellular life, which laid the foundation for the development of complex cellular structures and eventually the release of
oxygen into the atmosphere through oxygen-producing cyanobacteria, marking the oxygen revolution. The subsequent
evolution of nucleated cells, multicellularity, and the rapid diversification of life during the Cambrian explosion represent the
culmination of these key steps in the history of life on Earth.
QUESTION 7
Which statement represents the best explanation for the observation that the nuclear DNA of wolves and
domestic dogs has a very high degree of sequence homology? Dogs and wolves ________.
Are both members of Carnivora
You Answered
Have very similar morphologies
Belong to the same Taxonomic Order
Share a very recent common ancestor
CORRECT ANSWER
Share a very recent common ancestor
RATIONALE: Sequence homology between nuclear DNA of wolves and domestic dogs indicates a shared genetic history due
to a common ancestor, and the time period between this common ancestor and the present is relatively short, hence "very
recent". This implies that the genetic changes occurred in a relatively short period, resulting in a high degree of similarity
between the nuclear DNA of wolves and domestic dogs.
Trusted by thousands of students and professionals worldwide Page 3 of 31
, QUESTION 8
Convergent evolution leads to homology (T/F)
CORRECT ANSWER
False
RATIONALE: Convergent evolution occurs when different species independently develop similar traits or structures in
response to similar environmental pressures or selection forces, resulting in analogous structures that are not directly
related. Homology, on the other hand, refers to the shared ancestry and evolutionary history of traits or structures between
different species, indicating a common origin.
QUESTION 9
The rapid evolution of many different body forms within a single clade is called
CORRECT ANSWER
adaptive radiation
RATIONALE: Adaptive radiation occurs when a single ancestral species colonizes a new environment and its offspring
evolve distinct adaptations to exploit different ecological niches within that environment, leading to the rapid diversification
of body forms. This process is a key mechanism of speciation, allowing a single species to give rise to multiple new species
that are each well-suited to their specific environment.
QUESTION 10
True or false: We are currently experiencing the 6th major extinction event
CORRECT ANSWER
True
RATIONALE: Scientific consensus, based on the current rate and scale of species extinctions, supports the conclusion that
we are experiencing a significant extinction event, often referred to as the Holocene extinction event or the sixth extinction,
which is primarily driven by human activities such as habitat destruction, pollution, and climate change. This event is
considered a major extinction event because it is occurring at a rate orders of magnitude faster than the natural
background rate of species extinctions, leading to a significant loss of biodiversity.
QUESTION 11
The oldest fossils are approximately _______ billion years old.
CORRECT ANSWER
3..5
RATIONALE: The question asks for an approximate age of the oldest fossils, which corresponds to the Earth's age, as
fossils are a result of life on Earth. The correct answer, 3..5 billion years, is based on scientific estimates of the Earth's
formation and evolution, with 3.8 billion years being the age of the oldest fossils found and 3.5 billion years representing
the Earth's formation.
Trusted by thousands of students and professionals worldwide Page 4 of 31
BIEDERMAN EXAM 1
85+ (Latest 2026 Edition) 100% Verified Q&A + Answer Key Solutions
100% Guarantee Pass
📋 DOCUMENT OVERVIEW 85 Qs
This document, "BIO 211- Iowa State University Biederman Exam 1," specifically covers topics such as the
definition of life, evolution, cellular life, multicellularity, and molecular biology, including archaea, bacteria,
and eukarya. It provides a comprehensive review of biology concepts, with 85 questions and their
corresponding correct answers, accompanied by detailed explanations and rationales. This resource allows
students to study, review, and understand these biology concepts more effectively, enabling them to
reinforce their knowledge and prepare for exams in introductory biology courses.
✓ Verified Answers ✓ Exam Ready ✓ Study Guide
Trusted by thousands of students and professionals worldwide
EXAM QUESTIONS
QUESTION 1
Scientific theories are just "ideas" (T/F)
CORRECT ANSWER
false
RATIONALE: Scientific theories are not merely subjective ideas, but rather well-substantiated explanations for a set of
phenomena, supported by a large body of evidence and consistently tested through experimentation and observation. This
rigorous process of testing and validation distinguishes scientific theories from mere ideas or hypotheses.
Trusted by thousands of students and professionals worldwide Page 1 of 31
, QUESTION 2
What is NOT considered a quality within the definition of life?
Living things evolve
Living things can grow and develop
Living things are sentient
Living things use energy
CORRECT ANSWER
Living things are sentient
RATIONALE: Being sentient refers to having the capacity for subjective experience, emotions, and consciousness, which is
not a necessary or universally required characteristic among all living organisms. This means that there are some living
things, such as single-celled organisms like bacteria, that do not possess sentience, making it a quality that is not
universally applicable to all living things within the definition of life.
QUESTION 3
In some cases an observational study is more appropriate than an experiment. (T/F)
CORRECT ANSWER
True
RATIONALE: In some cases, an observational study is more appropriate than an experiment because it allows researchers
to explore real-world phenomena and relationships without artificially manipulating variables, which can be impractical or
unethical. For example, studying the long-term effects of a naturally occurring environmental disaster or the outcomes of a
common medical procedure can provide valuable insights and knowledge in a way that an experiment cannot.
QUESTION 4
The oldest fossils humans have discovered are from organisms called________.
CORRECT ANSWER
stromatolites
RATIONALE: Stromatolites are the oldest fossils discovered by humans because they are layered structures formed by
ancient microbial communities, with evidence of their existence dating back over 3.5 billion years to the Precambrian era.
The preservation of these structures in rocks provides a direct record of early life on Earth, making them the oldest known
fossils that have been discovered.
Trusted by thousands of students and professionals worldwide Page 2 of 31
, QUESTION 5
Extant means this species still lives on earth. (T/F)
CORRECT ANSWER
True
RATIONALE: The term "extant" specifically refers to a species or organism that currently exists and is alive on Earth, which
means it has not become extinct. In this context, the concept of "extant" is used to indicate the presence and survival of a
species over time, which aligns with the idea that it still lives on Earth.
QUESTION 6
Put the 5 major steps in the history of life on earth in order:
CORRECT ANSWER
1. cellular life
2. oxygen revolution
3. nucleated cells
4. multicellularity
5. Cambrian explosion
RATIONALE: The correct order reflects the major milestones in the evolution of life on Earth, starting with the emergence
of cellular life, which laid the foundation for the development of complex cellular structures and eventually the release of
oxygen into the atmosphere through oxygen-producing cyanobacteria, marking the oxygen revolution. The subsequent
evolution of nucleated cells, multicellularity, and the rapid diversification of life during the Cambrian explosion represent the
culmination of these key steps in the history of life on Earth.
QUESTION 7
Which statement represents the best explanation for the observation that the nuclear DNA of wolves and
domestic dogs has a very high degree of sequence homology? Dogs and wolves ________.
Are both members of Carnivora
You Answered
Have very similar morphologies
Belong to the same Taxonomic Order
Share a very recent common ancestor
CORRECT ANSWER
Share a very recent common ancestor
RATIONALE: Sequence homology between nuclear DNA of wolves and domestic dogs indicates a shared genetic history due
to a common ancestor, and the time period between this common ancestor and the present is relatively short, hence "very
recent". This implies that the genetic changes occurred in a relatively short period, resulting in a high degree of similarity
between the nuclear DNA of wolves and domestic dogs.
Trusted by thousands of students and professionals worldwide Page 3 of 31
, QUESTION 8
Convergent evolution leads to homology (T/F)
CORRECT ANSWER
False
RATIONALE: Convergent evolution occurs when different species independently develop similar traits or structures in
response to similar environmental pressures or selection forces, resulting in analogous structures that are not directly
related. Homology, on the other hand, refers to the shared ancestry and evolutionary history of traits or structures between
different species, indicating a common origin.
QUESTION 9
The rapid evolution of many different body forms within a single clade is called
CORRECT ANSWER
adaptive radiation
RATIONALE: Adaptive radiation occurs when a single ancestral species colonizes a new environment and its offspring
evolve distinct adaptations to exploit different ecological niches within that environment, leading to the rapid diversification
of body forms. This process is a key mechanism of speciation, allowing a single species to give rise to multiple new species
that are each well-suited to their specific environment.
QUESTION 10
True or false: We are currently experiencing the 6th major extinction event
CORRECT ANSWER
True
RATIONALE: Scientific consensus, based on the current rate and scale of species extinctions, supports the conclusion that
we are experiencing a significant extinction event, often referred to as the Holocene extinction event or the sixth extinction,
which is primarily driven by human activities such as habitat destruction, pollution, and climate change. This event is
considered a major extinction event because it is occurring at a rate orders of magnitude faster than the natural
background rate of species extinctions, leading to a significant loss of biodiversity.
QUESTION 11
The oldest fossils are approximately _______ billion years old.
CORRECT ANSWER
3..5
RATIONALE: The question asks for an approximate age of the oldest fossils, which corresponds to the Earth's age, as
fossils are a result of life on Earth. The correct answer, 3..5 billion years, is based on scientific estimates of the Earth's
formation and evolution, with 3.8 billion years being the age of the oldest fossils found and 3.5 billion years representing
the Earth's formation.
Trusted by thousands of students and professionals worldwide Page 4 of 31
