Evolutionary Biology Quiz
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Questions and Answers

What is the term for the evolutionary process where new species undergo rapid changes followed by long periods of stability?

  • Allopatric speciation
  • Gradualism
  • Convergent evolution
  • Punctuated equilibrium (correct)

What unique feature distinguishes amphibians from mammals, reptiles, and birds in terms of evolutionary traits?

  • Fur
  • Scales
  • Amniotic egg (correct)
  • Lungs

Which of the following concepts describes the diversification of species to adapt to different niches?

  • Adaptive radiation (correct)
  • Natural selection
  • Genetic drift
  • Speciation

Which of the following processes involves the formation of new species in the same geographical area?

<p>Sympatric speciation (C)</p> Signup and view all the answers

Which of the following mechanisms is primarily responsible for the gradual accumulation of small changes within a species over time?

<p>Natural selection (D)</p> Signup and view all the answers

The Darwinian fitness of an individual is measured most directly by what factor?

<p>the number of its offspring that survive to reproduce (C)</p> Signup and view all the answers

What term describes the process where humans selectively breed individuals for specific traits?

<p>artificial selection (B)</p> Signup and view all the answers

Which of the following is NOT a direct measure of Darwinian fitness?

<p>the number of food sources available (C)</p> Signup and view all the answers

Which of the following best contrasts artificial selection with natural selection?

<p>natural selection occurs without human involvement (D)</p> Signup and view all the answers

In the context of evolution, which statement is true regarding the offspring produced through artificial selection?

<p>They tend to exhibit traits favored by humans. (C)</p> Signup and view all the answers

What trait differentiates amphibians from mammals, reptiles, and birds?

<p>Amniotic egg (amnion) (B)</p> Signup and view all the answers

Which evolutionary concept is exemplified by the diversity of Galapagos Finches?

<p>Adaptive Radiation (C)</p> Signup and view all the answers

What feature is NOT associated with reptiles and birds?

<p>Water-dependent reproduction (B)</p> Signup and view all the answers

Which of the following traits is characteristic of mammals?

<p>Mammary glands (D)</p> Signup and view all the answers

Which type of speciation involves the emergence of new species from a common ancestor due to adaptation to different environments?

<p>Adaptive Radiation (D)</p> Signup and view all the answers

What is the term for the phenomenon where a single gene impacts multiple traits in an organism?

<p>Pleiotropy (B)</p> Signup and view all the answers

Which characteristic is a fundamental requirement for all living organisms?

<p>Requirement for energy (B)</p> Signup and view all the answers

Which of the following processes does NOT directly support the idea of a common ancestry among living organisms?

<p>Natural selection (B)</p> Signup and view all the answers

Which of the following best describes the way Sickle Cell Anemia is inherited?

<p>Pleiotropy (B)</p> Signup and view all the answers

Which statement about polygenic inheritance is true?

<p>It involves multiple genes influencing a single trait. (A)</p> Signup and view all the answers

What process describes the Galapagos Finches evolving into multiple species from a common ancestor?

<p>Adaptive Radiation (C)</p> Signup and view all the answers

Which type of speciation occurs when a population becomes isolated in different geographical areas?

<p>Allopatric speciation (B)</p> Signup and view all the answers

What is the term used for a single gene influencing multiple phenotypic traits?

<p>Pleiotropy (A)</p> Signup and view all the answers

Which of the following best describes the finches' adaptation to different environments in the Galapagos Islands?

<p>Natural Selection (B)</p> Signup and view all the answers

Which of these mechanisms does NOT contribute to the divergence between species in the Galapagos Islands?

<p>Gene Flow (B)</p> Signup and view all the answers

What is the term for the phenomenon when a red-flowered plant and a white-flowered plant produce only pink-flowered offspring?

<p>Incomplete Dominance (C)</p> Signup and view all the answers

What does the term 'genome' refer to in a population?

<p>The total collection of genes within a population (D)</p> Signup and view all the answers

Which type of inheritance is suggested by all offspring displaying a mixed phenotype, such as pink flowers from red and white parents?

<p>Incomplete Dominance (C)</p> Signup and view all the answers

In the context of genetics, what kind of allele interaction does codominance refer to?

<p>Both alleles express independently in the phenotype (D)</p> Signup and view all the answers

If the genetic composition of a population is altered, what is this change in the context of natural selection?

<p>The genome has adapted to environmental pressures (B)</p> Signup and view all the answers

What feature of all organisms suggests a common origin of life on Earth?

<p>All organisms use essentially the same genetic code (DNA). (A)</p> Signup and view all the answers

Which characteristic is shared by all organisms?

<p>All organisms reproduce. (B)</p> Signup and view all the answers

What is the term for the total collection of genes within a population at any one time?

<p>Gene pool (A)</p> Signup and view all the answers

What type of evidence would suggest that all organisms exhibit a similar key feature?

<p>All organisms show variation. (C)</p> Signup and view all the answers

Which of the following is NOT a characteristic shared by all living organisms?

<p>All organisms can move. (D)</p> Signup and view all the answers

Which of the following terms describes a change in the DNA sequence of an organism?

<p>Mutation (C)</p> Signup and view all the answers

What implies that a species has evolved over time?

<p>All species show variation. (C)</p> Signup and view all the answers

What does a gene map represent?

<p>The arrangement of genes on a chromosome (B)</p> Signup and view all the answers

Which option does NOT represent a genetic concept related to populations?

<p>Carrying capacity (C)</p> Signup and view all the answers

What is the primary focus of population genetics?

<p>Study of gene frequencies in populations (D)</p> Signup and view all the answers

Which term describes the gradual increase in size of horses over time?

<p>directional selection (A)</p> Signup and view all the answers

What is the term used to refer to the complete set of genes in a population at a specific time?

<p>Gene pool (D)</p> Signup and view all the answers

Which evolutionary mechanism could lead to a uniform population size over time?

<p>Stabilizing selection (A)</p> Signup and view all the answers

Which concept seeks to explain the genetic variability present in a population?

<p>Gene pool (D)</p> Signup and view all the answers

What term best captures the change in allele frequencies in a population over generations?

<p>Evolution (A)</p> Signup and view all the answers

What term best describes the gradual increase in the size of horses over geologic time?

<p>Directional selection (A)</p> Signup and view all the answers

Which of the following factors is NOT a cause of microevolution?

<p>Extinction events (B)</p> Signup and view all the answers

Which examples illustrate the concept of microevolution?

<p>Changes in allele frequencies within a population (B)</p> Signup and view all the answers

What is an example of directional selection in nature?

<p>Increased size of peppered moths during the Industrial Revolution (D)</p> Signup and view all the answers

Which process accounts for changes in a population's gene pool due to random events?

<p>Genetic drift (A)</p> Signup and view all the answers

Flashcards

Darwinian fitness

A measure of an individual's reproductive success, typically the number of offspring that survive to reproduce.

Artificial selection

The process by which humans select individuals with desirable traits to breed and produce offspring with those traits.

Natural Selection

The process where organisms with traits better suited to their environment are more likely to survive and reproduce, passing those traits to their offspring.

Desirable traits

Characteristics or features that are considered beneficial or preferred by humans for breeding purposes.

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Reproductive success

A measure of an individual's ability to reproduce effectively and have offspring, ultimately passing its genes to the next generation.

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Punctuated equilibrium

A theory of evolution suggesting species evolve rapidly during short periods followed by long periods of little change.

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Amniotic egg (amnion)

A major evolutionary adaptation that separates amphibians from other vertebrate groups like mammals, reptiles, and birds.

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Sympatric speciation

The formation of new species within the same geographic area.

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Adaptive radiation

The rapid diversification of a single lineage into many different species, often in response to new environmental opportunities.

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Sexual selection

The process by which traits that increase mating success evolve, even if they might decrease survival.

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Galapagos Finches example of

Adaptive radiation and allopatric speciation, meaning that a species evolved into many different species as it adapted to different islands in the Galapagos.

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Allopatric Speciation

A species evolves into new species due to geographic separation

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Multiple phenotypic effects of a single gene

A single gene can influence many traits, like sickle cell anemia.

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Sickle Cell Anemia

Example of a disease caused by a single gene that has multiple effects on the body.

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Common origin of life

All life on Earth shares a single ancestor.

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Evidence for common origin

Similar genetic code (DNA) used by all organisms.

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Red-white flower cross (result)

Offspring have a mixed trait (pink flowers).

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Inherited trait

Characteristics passed from parents to offspring.

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Trait separating amphibians from other groups?

The amniotic egg (amnion) is the trait that separates amphibians from mammals, reptiles, and birds.

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Incomplete dominance

Neither allele is completely dominant or recessive.

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What is adaptive radiation?

Adaptive radiation is when a single species rapidly evolves into many new species with different traits in new environments.

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Amniotic egg

A type of egg with extra membranes that protect the embryo.

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Pleiotropy definition

A single gene influencing multiple traits.

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Shared Energy Needs

All life forms require energy to survive; it's a universal need.

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Codominance

A pattern of inheritance where both alleles are expressed equally in a heterozygote, resulting in a phenotype that shows both traits. For example, a red flower crossed with a white flower produces a flower with red and white patches.

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Pleiotropy

A situation where a single gene influences multiple phenotypic traits.

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Polygenic Inheritance

A pattern where multiple genes contribute to a single trait, resulting in a continuous range of phenotypes. For example, human height is influenced by many genes.

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Genome

The complete set of genes or genetic material present in an organism.

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Directional Selection

A type of natural selection where one extreme phenotype is favored over others, leading to a shift in the population's average trait value.

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Microevolution

Changes in the genetic makeup of a population over generations.

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Genetic Drift

Random changes in allele frequencies within a population, especially significant in small populations.

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Gene Flow

The movement of alleles between populations, introducing new genes or altering existing ones.

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Stabilizing selection

A type of natural selection where the intermediate phenotype is favored, reducing variation in a population.

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Disruptive selection

A type of natural selection where both extreme phenotypes are favored, leading to a split in a population.

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What is a gene pool?

The total collection of genes within a population at any given time. It represents the genetic diversity available for natural selection to act upon.

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Population genetics

The study of genetic variation within and between populations.

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Allele frequencies

The proportion of each allele for a particular gene in a population. This can be influenced by factors like mutations, genetic drift, and natural selection.

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What factors influence allele frequencies?

Allele frequencies, or the proportion of each allele for a particular gene in a population, can be influenced by factors such as mutations, genetic drift, and natural selection.

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