Hybridization and Speciation

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Questions and Answers

What type of reproductive isolation prevents successful mating due to morphological differences?

  • Habitat isolation
  • Behavioral isolation
  • Hybrid breakdown
  • Mechanical isolation (correct)

Which type of prezygotic barrier involves different breeding times for species, preventing them from mixing their gametes?

  • Gametic isolation
  • Temporal isolation (correct)
  • Habitat isolation
  • Behavioral isolation

What is the term for the offspring of crosses between different species?

  • Isolates
  • Gametes
  • Viabilities
  • Hybrids (correct)

Which postzygotic barrier involves genes of different parent species interacting and impairing the hybrid's development or survival?

<p>Reduced hybrid viability (B)</p> Signup and view all the answers

Which reproductive barrier is characterized by two species not mating due to unique courtship rituals and behaviors?

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

What is the term for the inability of hybrids to reproduce even if they are vigorous?

<p>Reduced hybrid fertility (B)</p> Signup and view all the answers

What can drive sympatric speciation in cichlid fish in Lake Victoria?

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

What is an autopolyploid?

<p>An individual with more than two chromosome sets derived from one species (D)</p> Signup and view all the answers

What is an allopolyploid?

<p>An individual with multiple sets of chromosomes derived from different species (B)</p> Signup and view all the answers

What type of isolation restricts gene flow between populations in allopatric speciation?

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

What results from matings between autopolyploids and diploids?

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

What is a hybrid zone?

<p>A region in which members of different species mate and produce hybrids (C)</p> Signup and view all the answers

What happens when some first-generation hybrids mate with another species or parent species in terms of their offspring?

<p>Offspring of the next generation are feeble or sterile (B)</p> Signup and view all the answers

Which species concept cannot be applied to fossils or asexual organisms?

<p>Biological species concept (A)</p> Signup and view all the answers

Which species concept defines a species by structural features?

<p>Morphological species concept (A)</p> Signup and view all the answers

What does the ecological species concept emphasize about a species?

<p>Its ecological niche (B)</p> Signup and view all the answers

What is speciation?

<p>The process by which one species splits into two or more species (A)</p> Signup and view all the answers

How is a species defined under the phylogenetic species concept?

<p>As the smallest group of individuals sharing a common ancestor (C)</p> Signup and view all the answers

How does the biological species concept define a species?

<p>As a group of populations whose members can interbreed and produce viable, fertile offspring (A)</p> Signup and view all the answers

What is the relationship between microevolution and macroevolution?

<p>Microevolution involves allele frequency changes within populations, while macroevolution considers evolutionary changes above the species level (B)</p> Signup and view all the answers

In which type of speciation is gene flow interrupted due to geographic isolation of subpopulations?

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

What does the gene flow contribute to in a species?

<p>Maintains genetic diversity within populations (C)</p> Signup and view all the answers

Why do numerous concepts of species exist?

<p>Due to different goals like taxonomy, understanding group formation, and evolutionary history (B)</p> Signup and view all the answers

What does the term 'species' mean in Latin?

<p>Kind or appearance (B)</p> Signup and view all the answers

What term is used to describe periods of stasis in the fossil record?

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

Which sunflower species originated from the hybridization of two other sunflower species?

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

In Japanese Euhadra snails, what is controlled by a single gene?

<p>Shell spiral direction (B)</p> Signup and view all the answers

What factor influences pollinator preference in monkey flowers (Mimulus)?

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

How long can the interval between speciation events range, based on the text?

<p>40 million years (B)</p> Signup and view all the answers

What does macroevolution represent?

<p>Cumulative effect of both speciation and extinction events (C)</p> Signup and view all the answers

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