Question 1

What are the four main forces of evolution that act upon a species' gene pool?

Accepted Answer

mutation,natural selection,genetic drift,and gene flow

Question 2

Which of the following best describes Hardy-Weinberg equilibrium?

Accepted Answer

A) Hardy-Weinberg equilibrium represents a population that is evolving. 
B) Hardy-Weinberg equilibrium represents a population that is not evolving. 
C) Hardy-Weinberg equilibrium represents a population whose numbers are increasing. 
D) Hardy-Weinberg equilibrium represents a population whose numbers are decreasing. 
E) Hardy-Weinberg equilibrium represents a population whose numbers are stable. 
A) Hardy-Weinberg equilibrium represents a population that is evolving. 
B) Hardy-Weinberg equilibrium represents a population that is not evolving. 
C) Hardy-Weinberg equilibrium represents a population whose numbers are increasing. 
D) Hardy-Weinberg equilibrium represents a population whose numbers are decreasing. 
E) Hardy-Weinberg equilibrium represents a population whose numbers are stable. B

Question 3

Mating between closely related individuals is known as

Accepted Answer

A)  out crossing. 
B)  gene flow. 
C)  gene conservation. 
D)  inbreeding. 
E)  mate selectivity. 
A)  out crossing. 
B)  gene flow. 
C)  gene conservation. 
D)  inbreeding. 
E)  mate selectivity. D

Question 4

What five characteristics must a population have to never have a change in allele frequencies?

Accepted Answer

no mutation,no natur

Question 5

Some reproductive barriers prevent the formation of a zygote,others allow offspring to be born.Discuss the barriers that allow the birth of offspring,and explain why these hybrids are not the beginning of a pathway to a new species being formed.

Accepted Answer

Postzygotic barriers include hybrid invi

Question 6

An island has a population of 100,000 moths that has 98% gray individuals and 2% black individuals.Generation after generation,this ratio and population size remains basically the same.After a hurricane,10,000 black moths are blown onto the island.This is an example of _____________.

Accepted Answer

The answer of An island has a population of 100,000...

Question 7

Tay Sachs disease is caused by a recessive mutation on chromosome 15,and 1 of every 27 members of the Old Order Amish community of Pennsylvania carry a recessive allele.What is the chance that an Old Order Amish man who carries the allele will have a child with Tay Sachs? (Remember,the community restricts marriage to other members of the community.)

Accepted Answer

A)  1/4 (25%) chance 
B)  1/27 (3.7%) chance 
C)  100% chance 
D)  1/27 × 1/4 (.0926%) chance 
E)  1/2 (50%) chance 
A)  1/4 (25%) chance 
B)  1/27 (3.7%) chance 
C)  100% chance 
D)  1/27 × 1/4 (.0926%) chance 
E)  1/2 (50%) chance

Question 8

Darwin's finches are known for which adaptation?

Accepted Answer

A)  clutch variation 
B)  wing variation 
C)  size variation 
D)  beak variation 
E)  color variation 
A)  clutch variation 
B)  wing variation 
C)  size variation 
D)  beak variation 
E)  color variation

Question 9

A limited number of alleles in a reproducing population can result in

Accepted Answer

A)  disruptive selection. 
B)  stabilizing selection. 
C)  increased fitness. 
D)  inbreeding depression. 
E)  interbreeding. 
A)  disruptive selection. 
B)  stabilizing selection. 
C)  increased fitness. 
D)  inbreeding depression. 
E)  interbreeding.

Question 10

With respect to country mice and city mice,

Accepted Answer

A)  city mice have more allele diversity than country mice. 
B)  country mice have more alleles for stress compared to city mice. 
C)  both have similar allele diversity for most genes. 
D)  city mice share allele diversity with country mice with respect to diversity. 
E)  city mice are stressed less compared to country mice. 
A)  city mice have more allele diversity than country mice. 
B)  country mice have more alleles for stress compared to city mice. 
C)  both have similar allele diversity for most genes. 
D)  city mice share allele diversity with country mice with respect to diversity. 
E)  city mice are stressed less compared to country mice.

Question 11

A group of Trichechus manatus migrated from the Caribbean to Florida around 15,000 years ago,and is now genetically distinct from the Trichechus manatus still found in the Caribbean.This is an example of

Accepted Answer

A)  the founder effect. 
B)  artificial selection. 
C)  natural selection. 
D)  macroevolution. 
E)  the bottleneck effect. 
A)  the founder effect. 
B)  artificial selection. 
C)  natural selection. 
D)  macroevolution. 
E)  the bottleneck effect.

Question 12

The Nature Conservancy buys and then protects land inhabited by endangered or threatened species.Why is this a good strategy for saving these species? Be sure to discuss evolution and adaptation in your answer.

Accepted Answer

Many species are adapted to only one or

Question 13

In an isolated breeding population,____ the non-isolated population of the species.

Accepted Answer

A)  recessive genes will be more common than in 
B)  recessive alleles will be more common than in 
C)  allele ratios may be different from allele ratios of 
D)  allele ratios will be exactly the same as the allele ratios of 
E)  dominant alleles will be more common than in 
A)  recessive genes will be more common than in 
B)  recessive alleles will be more common than in 
C)  allele ratios may be different from allele ratios of 
D)  allele ratios will be exactly the same as the allele ratios of 
E)  dominant alleles will be more common than in

Question 14

You have a population of flies with three alleles for wing size,L (large),M (medium),and S (small).Individuals with SS,SM,or SL have small wings.Individuals with MM have medium wings.Individuals with LL or LM have large wings.After a sudden storm,all of the small-winged individuals have been killed.What will happen to the population after ten generations?

Accepted Answer

A)  All three wing types will be present. 
B)  Only large wings will be present. 
C)  Only small wings will be present. 
D)  Small wings will be missing. 
E)  Medium wings will be missing. 
A)  All three wing types will be present. 
B)  Only large wings will be present. 
C)  Only small wings will be present. 
D)  Small wings will be missing. 
E)  Medium wings will be missing.

Question 15

Two species of salamanders have overlapping territories and they successfully mate and produce eggs.However,most of the eggs fail to hatch.Only 10% of them hatch,but the tadpoles are weak and are almost all killed by predators.The few tadpoles that exit the water have weak bones and soon die.This is an example of

Accepted Answer

A)  hybrid breakdown. 
B)  gametic isolation. 
C)  hybrid inviability. 
D)  ecological isolation. 
E)  hybrid infertility. 
A)  hybrid breakdown. 
B)  gametic isolation. 
C)  hybrid inviability. 
D)  ecological isolation. 
E)  hybrid infertility.

Question 16

An ethnobiological study of several Mexican Amerindian groups looked at how they named the plants in their region.Biologists noted that their plant names and groupings closely matched the species and generic groupings used by botanists.For example,each species of prickly pear cactus (Opuntia)was clearly defined,and all species of Opuntia were placed into one category in the local language.Other studies have shown that other traditional groups have similar native taxonomy systems that match well with biologists' grouping to the generic level.Why is this not surprising from a taxonomic and an evolutionary perspective?

Accepted Answer

The groups that taxonomists used are bas

Question 17

What five characteristics must a population have to never have a change in allele frequencies? Are all five of these possible?

Accepted Answer

The five characteristics are: no mutatio

Question 18

Which of the following can threaten the ability of a population to adapt to changing environmental conditions?

Accepted Answer

A)  bottleneck 
B)  founder effect 
C)  genetic drift 
D)  inbreeding 
E)  All of the above. 
A)  bottleneck 
B)  founder effect 
C)  genetic drift 
D)  inbreeding 
E)  All of the above.

Question 19

The ice age 10,000 years ago killed off most cheetahs.This is an example of

Accepted Answer

A)  the founder effect. 
B)  artificial selection. 
C)  natural selection. 
D)  macroevolution. 
E)  the bottleneck effect. 
A)  the founder effect. 
B)  artificial selection. 
C)  natural selection. 
D)  macroevolution. 
E)  the bottleneck effect.

Question 20

A series of strong storms opened a stream channel between two lakes.The western lake contains a large,diverse population of a species of minnow.The eastern lake has never been populated by fish.When the channel opened,a small group of fish migrated to the eastern lake.Soon after,the stream channel dried up and was never opened again.The fish in the eastern lake thrived and continued to reproduce,building a large population over time.Compared with the fish in the western lake,what characteristics would you expect the population in the eastern lake to exhibit?

Accepted Answer

A)  reduced genetic diversity but no change in allele frequency 
B)  reduced genetic diversity and a change in allele frequency 
C)  no change in genetic diversity but a change in allele frequency 
D)  no change in either genetic diversity or allele frequency 
E)  The information provided is insufficient to answer the question. 
A)  reduced genetic diversity but no change in allele frequency 
B)  reduced genetic diversity and a change in allele frequency 
C)  no change in genetic diversity but a change in allele frequency 
D)  no change in either genetic diversity or allele frequency 
E)  The information provided is insufficient to answer the question.

Exam 15: A: Nonadaptive Evolution and Speciation Urban Evolution

What are the four main forces of evolution that act upon a species' gene pool?

Which of the following best describes Hardy-Weinberg equilibrium?

Mating between closely related individuals is known as

What five characteristics must a population have to never have a change in allele frequencies?

Some reproductive barriers prevent the formation of a zygote,others allow offspring to be born.Discuss the barriers that allow the birth of offspring,and explain why these hybrids are not the beginning of a pathway to a new species being formed.

An island has a population of 100,000 moths that has 98% gray individuals and 2% black individuals.Generation after generation,this ratio and population size remains basically the same.After a hurricane,10,000 black moths are blown onto the island.This is an example of _____________.

Darwin's finches are known for which adaptation?

A limited number of alleles in a reproducing population can result in

With respect to country mice and city mice,

A group of Trichechus manatus migrated from the Caribbean to Florida around 15,000 years ago,and is now genetically distinct from the Trichechus manatus still found in the Caribbean.This is an example of

The Nature Conservancy buys and then protects land inhabited by endangered or threatened species.Why is this a good strategy for saving these species? Be sure to discuss evolution and adaptation in your answer.

In an isolated breeding population,____ the non-isolated population of the species.

What five characteristics must a population have to never have a change in allele frequencies? Are all five of these possible?

Which of the following can threaten the ability of a population to adapt to changing environmental conditions?

The ice age 10,000 years ago killed off most cheetahs.This is an example of

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

DNA Structure and Replication Biologically Unique

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Single-Gene Inheritance and Meiosis Rock for a Cause

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

Natural Selection and Adaptation Bugs That Resist Drugs

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Life on Earth Qa: Evolution

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

B: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

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