Question 1

The influence of genetic drift on allele frequencies increases as

Accepted Answer

A)  gene flow increases. 
B)  population size decreases. 
C)  mutation rate decreases. 
D)  the number of heterozygous loci increases. 
E)  population size increases. 
A)  gene flow increases. 
B)  population size decreases. 
C)  mutation rate decreases. 
D)  the number of heterozygous loci increases. 
E)  population size increases.

Question 2

Which of the following groups represents the MOST closely related organisms?

Accepted Answer

A)  kingdoms 
B)  species 
C)  orders 
D)  genera 
E)  taxa 
A)  kingdoms 
B)  species 
C)  orders 
D)  genera 
E)  taxa

Question 3

The thighbone attached to the pelvic girdle is represented by the letter ____.

Accepted Answer

The answer of   
 The thighbone attached to...

Question 4

Natural selection is best summarized as

Accepted Answer

A)  mutation in various species. 
B)  independent assortment of genes during meiosis. 
C)  the difference in survival and reproduction in a population. 
D)  changes in chromosome number or structure. 
E)  the adaptation of varying individuals to changes in the environment. 
A)  mutation in various species. 
B)  independent assortment of genes during meiosis. 
C)  the difference in survival and reproduction in a population. 
D)  changes in chromosome number or structure. 
E)  the adaptation of varying individuals to changes in the environment.

Question 5

Organisms "X" and "Y" are suspected to be the same species. Which of the following will provide the ultimate proof?

Accepted Answer

A)  interbreeding 
B)  anatomy 
C)  physiology 
D)  ecology 
E)  behavior 
A)  interbreeding 
B)  anatomy 
C)  physiology 
D)  ecology 
E)  behavior

Question 6

One theory holds that complex molecules formed on clay. This is because clay attracts

Accepted Answer

A)  oxygen. 
B)  lipids. 
C)  nucleic acids. 
D)  amino acids. 
E)  carbon. 
A)  oxygen. 
B)  lipids. 
C)  nucleic acids. 
D)  amino acids. 
E)  carbon.

Question 7

The word evolution , as used in biology, literally means

Accepted Answer

A)  natural selection. 
B)  genetic drift. 
C)  divergence. 
D)  genetic change. 
E)  mutation. 
A)  natural selection. 
B)  genetic drift. 
C)  divergence. 
D)  genetic change. 
E)  mutation.

Question 8

Two individuals are members of the same species if they

Accepted Answer

A)  possess the same number of chromosomes. 
B)  breed at the same time. 
C)  are phenotypically indistinguishable. 
D)  can mate and produce fertile offspring. 
E)  look alike. 
A)  possess the same number of chromosomes. 
B)  breed at the same time. 
C)  are phenotypically indistinguishable. 
D)  can mate and produce fertile offspring. 
E)  look alike.

Question 9

Early in the Earth's history, there was a massive "supercontinent" known as

Accepted Answer

A)  Gondwana. 
B)  Pangea. 
C)  Botswana. 
D)  Pellagra. 
E)  Panagra. 
A)  Gondwana. 
B)  Pangea. 
C)  Botswana. 
D)  Pellagra. 
E)  Panagra.

Question 10

Background extinction is a measure of

Accepted Answer

A)  the rate of species turnover at the end of geological eras. 
B)  the number of species that suffer extinction at the beginning of geological eras. 
C)  the steady rate of species turnover within a lineage throughout most of their evolutionary history. 
D)  the lowest rate of species turnover within a lineage observed within a geological era. 
E)  the animals that appear in the dense forest. 
A)  the rate of species turnover at the end of geological eras. 
B)  the number of species that suffer extinction at the beginning of geological eras. 
C)  the steady rate of species turnover within a lineage throughout most of their evolutionary history. 
D)  the lowest rate of species turnover within a lineage observed within a geological era. 
E)  the animals that appear in the dense forest.

The influence of genetic drift on allele frequencies increases as

Which of the following groups represents the MOST closely related organisms?

The thighbone attached to the pelvic girdle is represented by the letter ____.

Natural selection is best summarized as

Organisms "X" and "Y" are suspected to be the same species. Which of the following will provide the ultimate proof?

One theory holds that complex molecules formed on clay. This is because clay attracts

The word evolution , as used in biology, literally means

Two individuals are members of the same species if they

Early in the Earth's history, there was a massive "supercontinent" known as

Background extinction is a measure of

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Ecology

Human Impacts on the Biosphere

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Exam 23: Principles of Evolution

The influence of genetic drift on allele frequencies increases as

Which of the following groups represents the MOST closely related organisms?

The thighbone attached to the pelvic girdle is represented by the letter ____.

Natural selection is best summarized as

Organisms "X" and "Y" are suspected to be the same species. Which of the following will provide the ultimate proof?

One theory holds that complex molecules formed on clay. This is because clay attracts

The word evolution , as used in biology, literally means

Two individuals are members of the same species if they

Early in the Earth's history, there was a massive "supercontinent" known as

Background extinction is a measure of

Learning About Human Biology

Chemistry of Life

Cells and How They Work

Tissues, Organs, and Organ Systems

The Skeletal System

The Muscular System

Circulation: the Heart and Blood Vessels

Blood

Immunity and Disease

The Respiratory System

Digestion and Nutrition

The Urinary System

The Nervous System

Sensory Systems

The Endocrine System

Reproductive Systems

Development and Aging

Cell Reproduction

Introduction to Genetics

Chromosomes and Human Genetics

DNA, Genes, and Biotechnology

Genes and Disease: Cancer

Principles of Ecology

Human Impacts on the Biosphere

Filters