1. Define evolution. 2. Evolution depends on variation in the traits that individuals possess within a population. Describe how that variation is produced. 3. Describe the four main mechanisms of evolution (mutation, genetic drift, gene flow, natural selection) and how they operate. 4. Define species. Describe the ways in which new species may arise. Explain how microevolution differs from macroevolution. 1) A. Anteaters have long, sticky tongues that they can extend into holes to reach insects to eat. Individuals with a genotype for long tongues may have increased fitness due to their ability to reach insects in deeper holes. This trait could be a result of evolution by. B. If that is the case, then anteaters with longer tongues should survive and than individuals with shorter tongues. Long tongues could then be considered a(an) more C. The variation between individual anteaters in terms of their tongue lengths and other characteristics is produced by and recombination of genes during gamete production and fertilization. 2) The population of elephant seals on the west coast of North America was reduced by hunting to only 20 or so individuals. The lucky individuals survived by chance rather than the presence of any traits to help them avoid hunters. Now, there are over 30,000 individuals in the population, but the genetic variation is much lower than you would typically expect. The loss of genetic diversity is an example of microevolution occurring by 3) Coconuts are buoyant and travel across oceans, being pushed by water currents and the wind. If they arrive on the shores of an island, they may germinate and grow into reproductive adults. Movement of coconuts between nearby islands in an archipelago allows genes from coconut palms on one island to be mixed (via reproduction) with genes from coconut palms on other islands. The movement of genes between islands means that the islands experience that prevents the trees on individual islands from being reproductively isolated. 4) As climate change causes glaciers to melt in Greenland and other polar areas, large streams of meltwater form. Suppose these streams form barriers that prevent ants from crossing from one side to the other, isolating the ants from the populations on the other side of the streams. If this persists for many years, speciation could occur. What kind of speciation would this be? Describe how this process would operate. 5) The wildfires in California are killing millions of organisms including birds, squirrels, insects and other animals. If the frequency of traits in these populations changes as a result of the deaths from the fire, two possible mechanisms of evolution could be at work. Name the two possible mechanisms and describe how each would be operating in this scenario. Qunitemy to innuder icheresturini ia produced by. podecter osl berticusient Qumitions ing motuler ihar moternics is prosucend by previn taen ald lertiluatien. Aow the prowal twele eperint. Evolution.

1. 1. Define evolution.
2. Evolution depends on variation in the traits that individuals possess within a population. Describe how that variation
is produced.
3. Describe the four main mechanisms of evolution (mutation, genetic drift, gene flow, natural selection) and how they
operate.
4. Define species. Describe the ways in which new species may arise.
Explain how microevolution differs from macroevolution.
1) A. Anteaters have long, sticky tongues that they can extend into holes to reach insects to eat.
Individuals with a genotype for long tongues may have increased fitness due to their ability to reach insects in deeper
holes. This trait could be a result of evolution by.
B. If that is the case, then anteaters with longer tongues should survive and than individuals with shorter tongues.
Long tongues could then be considered a(an)
more
C. The variation between individual anteaters in terms of their tongue lengths and other characteristics is produced by
and recombination of genes during gamete
production and fertilization.
2) The population of elephant seals on the west coast of North America was reduced by hunting to only 20 or so
individuals. The lucky individuals survived by chance rather than the presence of any traits to help them avoid
hunters. Now, there are over 30,000 individuals in the population, but the genetic variation is much lower than you
would typically expect. The loss of genetic diversity is an example of microevolution occurring by
3) Coconuts are buoyant and travel across oceans, being pushed by water currents and the wind. If they arrive on the
shores of an island, they may germinate and grow into reproductive adults.
Movement of coconuts between nearby islands in an archipelago allows genes from coconut palms on one island to
be mixed (via reproduction) with genes from coconut palms on other islands. The movement of genes between
islands means that the islands experience that prevents the trees on individual islands from being reproductively
isolated.
4) As climate change causes glaciers to melt in Greenland and other polar areas, large streams of meltwater form.
Suppose these streams form barriers that prevent ants from crossing from one side to the other, isolating the ants
from the populations on the other side of the streams. If this persists for many years, speciation could occur. What
kind of speciation would this be? Describe how this process would operate.
5) The wildfires in California are killing millions of organisms including birds, squirrels, insects and other animals. If
the frequency of traits in these populations changes as a result of the deaths from the fire, two possible mechanisms
of evolution could be at work. Name the two possible mechanisms and describe how each would be operating in this
scenario.

2. Qunitemy to innuder icheresturini ia produced by. podecter osl berticusient Qumitions ing
motuler ihar moternics is prosucend by previn taen ald lertiluatien. Aow the prowal twele
eperint. Evolution Worksheet As you are reading and taking notes about Evolution in the
textbook and Understanding Evolution web site, it may be helpful to summarize information.
The following worksheet will help you identify important information and reinforce your
understanding of the readings. Define evolution. Evolution depends on variation in the traits that
individuals possess within a population. Describe how that variation is produced. Describe the
four main mechanisms of evolution (mutation, genetic drift, gene flow, natural selection) and
how they operate. Define species. Describe the ways in which new species may arise. Explain
how microevolution differs from macroevolution. Questions to consider: Now that you have
summariced some important elements of the assigned readings. Answer the following questions
to practice your knowledge. 1) A. Anteaters have long, sticky tongues that they can extend into
holes to reach insects to eat. Individuals with a genotype for long tongues may have increased
fitness due to their abliay to reach insects in deeper holes. This trait could be a result of evolution
by B. If that is the case, then anteaters with longer tongues should survive and more than
individuals with shorter tongues. Long tongues could then be considered a(an) C. The variation
between individual anteaters in terms of their tongue lengths and other characteristies is
produced by and recombination of genes during gamete production and fertilization. 2) The
population of elephant seals on the west coast of North America was reduced by hunting to only
20 or so individuals. The fucky individuals survived by chance rather than the presence of any
traits to help them avoid hunters. Now, there are over 30,000 individuals in the population, but
the genetic variation is much lower than you would tvpically expect. The ioss of genetic diversity
is an example of microevolution occurting by. 3) Coconuts are buoyant and travel across oceans,
being pushed by water currents and the wind. If they arrive on the shores of an island, they may
serminate and grow into reproductive adults. Movement of coconsts between nearby islands in
an archipelago allows genes from coconut palms on one island to be miked (via reproduction)
with genes from coconut paims on other islands. The movement of genes between islands means
that the islands experience that prevents the trees on individual ialands from being reproductively
bolated. 4) As climate change causes glaciers to mek in Greenland and other polar areas, large
streams of meltwater form. Suppose these streams form barriers that prevent ants from crossing
from one side to the other, isolating the ants from the populations on the other side of the
streams. If this persists for many years, speciation could occur. What kind of speciation would
this be? Describe how this process would operate. 5) The wildfires in California are killing
millions of organisms including birds, squirreks, insects and other animals. If the frequency of
traits in these populations changes as a result of the deaths from the fire, two possible
mechanisms of evolution could be at work. Name the two possible mechanisms and describe
how each would be operatine in this scenaric. Evolution Worksheet As you are reading and
taking notes about Evolution in the textbook and Understanding Evolution web site, it may be
helpful to summarize information. The following worksheet will help you identify important
information and reinforce your understanding of the readings. Define evolution. Evolution
depends on variation in the traits that individuals possess within a population. Describe how that
variation is produced. Describe the four main mechanisms of evolution (mutation, genetic drift,
gene flow, natural selection) and how they operate. Define species. Describe the ways in which

3. new species may arise. Explain how microevolution differs from macroevolution. A. Anteaters
have long, sticky tongues that they can extend into holes to reach insects to eat. Individuals with
a genotype for long tongues may have increased fitness due to their ability to reach insects in
deeper holes. This trait could be a result of evolution by B. If that is the case, then anteaters with
longer tongues should survive and more than individuals with shorter tongues. Long tongues
could then be considered a(an) C. The variation between individual anteaters in terms of their
tongue lengths and other characteristics is produced by and recombination of genes during
gamete production and fertilization. The population of elephant seals on the west coast of North
America was reduced by hunting to only 20 or so individuals. The lucky individuals survived by
chance rather than the presence of any traits to help them avoid hunters. Now, there are over
30,000 individuals in the population, but the genetic variation is much lower than you would
typically expect. The loss of genetic diversity is an example of microevolution occurring by 3)
Coconuts are buoyant and travel across oceans, being pushed by water currents and the wind. If
they arrive on the shores of an island, they may germinate and grow into reproductive adults.
Movement of coconuts between nearby islands in an archipelago allows genes from coconut
palms on one island to be mixed (via reproduction) with genes from coconut palms on other
islands. The movement of genes between islands means that the islands experience that prevents
the trees on individual islands from being reproductively isolated. 4) As climate change causes
glaciers to melt in Greenland and other polar areas, large streams of meltwater form. Suppose
these streams form barriers that prevent ants from crossing from one side to the other, isolating
the ants from the populations on the other side of the streams. If this persists for many years,
speciation could occur. What kind of speciation would this be? Describe how this process would
operate. 5) The wildfires in California are killing millions of organisms including birds, squirrels,
insects and other animals. If the frequency of traits in these populations changes as a result of the
deaths from the fire, two possible mechanisms of evolution could be at work. Name the two
possible mechanisms and describe how each would be operating in this scenario.