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BIOSCI101 Evolution - Lecture 6

Eilidh Young 11 preguntas

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Preguntas del test (11)

  1. 1Upon studying whether the classification of species is arbitrary or real, the general finding confirms that species are real and represent discrete groups that can reflect morphological, genetic and behavioural differences.

    However at present there is no one general agreed species definition.
    1. AVerdadero
    2. BFalso
  2. 2The biological species concept is at present the most commonly used concept.

    A species is a group of [blank_start]populations[blank_end] whose members can [blank_start]interbreed[blank_end] and produce viable offspring but [blank_start]do not[blank_end] interbreed with members of other species.
    1. Apopulations
    2. Binterbreed
    3. Cdo not
    4. Ddo
  3. 3One limit of the biological species concept is that it doesn’t apply to asexual organisms e.g. prokaryotes.
    1. AVerdadero
    2. BFalso
  4. 4Other species concepts

    The biological species concept focuses on reproductive barriers keeping species apart, other concepts emphasise unity within species.

    1. [blank_start]Morphological[blank_end] species concept, distinguishes a species based on body shape and size.
    2. [blank_start]Ecological[blank_end] species concept, defines a species in terms of its ecological niche.
    3. [blank_start]Phylogenetic[blank_end] species concept, defines a species as the smallest group of individuals that share a common ancestor.
    4. [blank_start]Specific mate recognition[blank_end] species concept, defines a species as a group of organisms that share a common mate recognition system.
    1. AMorphological
    2. BEcological
    3. CPhylogenetic
    4. DSpecific mate recognition
  5. 5ALLOPATRIC SPECIATION

    Allopatric speciation occurs when [blank_start]gene flow[blank_end] is interrupted as a result of a population being divided into geographically isolated subpopulations.
    1. Agene flow
  6. 6Label the images as either vicariance or dispersal allopatric speciation. Imagen de la pregunta 6
    1. AVicariance
    2. BDispersal
  7. 7SYMPATRIC SPECIATION

    Sympatric speciation can occur via [blank_start]polyploidy[blank_end], [blank_start]sexual selection[blank_end] and [blank_start]habitat differentiation[blank_end].

    Two forms of polyploidy have been observed in plants – autopolyploidy ([blank_start]self[blank_end]) and allopolyploidy ([blank_start]other[blank_end]).
    1. Apolyploidy
    2. Bdiploidy
    3. Cmonoploidy
    4. Dsexual selection
    5. Enatural selection
    6. Fhabitat differentiation
    7. Ghabitat integration
    8. Hself
    9. Iother
    10. Jother
    11. Kself
  8. 8What type of sympatric speciation is this diagram representing?Imagen de la pregunta 8
    1. Aautopolyploidy
  9. 9Select all that are CORRECT with regards to Allopolyploidy.
    1. AAn allopolyploid is a plant that is a hybrid between only one species.
    2. BThe resulting polyploid plants contain chromosome sets derived from two or more species.
    3. CMost hybrids are sterile because their chromosomes
      are not homologous and cannot pair during meiosis. (Such hybrids may be able to reproduce asexually).
    4. DIn subsequent generations, mitotic or meiotic non-disjunction can double the chromosome number and change a sterile hybrid into a fertile polyploid.
    5. EAllopolyploids are fertile when mating with each other but can not mate with either parental species.
  10. 10PATTERNS OF SPECIATION

    [blank_start]Anagenesis[blank_end] is gradual change within a single lineage over time.

    [blank_start]Cladogenesis[blank_end] is evolutionary change produced by the branching of populations to form new species.

    [blank_start]Adaptive radiation[blank_end] is the rapid formation of many new species from a single ancestral group, characteristically to fill a new ecological area / zone.

    [blank_start]Extinction[blank_end] is the disappearance of a species from the earth, the fossil record reveals a low steady rate of extinction interrupted periodically by mass extinction.
    1. AAnagenesis
    2. BCladogenesis
    3. CAdaptive radiation
    4. DExtinction

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Descripción
Stage I The University of Auckland BIOSCI 101 Test sobre BIOSCI101 Evolution - Lecture 6, creado por Eilidh Young el 19/06/2017.
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