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32.3 - Homework - Allopatric and Sympatric Speciation

Last updated 11 months ago
29 questions
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What is a species?
A species is a group of organisms capable of __________________ to produce ______________ that are viable and fertile.
Other Answer Choices:
lovable
offspring
trusted
interbreeding
1

Categorize the following based on fertility

  • infertile
  • most fertile
  • fertile
  • A dove lays 5 eggs
  • A dove lays 2 eggs
  • A dove lays no eggs
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When two different species mate they can produce a hybrid individual with chromosomes and genetic traits from both species. This can result in Reduced Hybrid Fertility which means:

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Categorize the following based on viability.

  • Infertile
  • Inviable
  • Fertile
  • Viable
  • Two different frog species mate but all of the tadpoles do not develop and die upon birth. The ofsspring are _____________.

    1 option
  • Two different frog species mate and all of the tadpoles live, but none of the tadpoles can reproduce. The offspring are _________ and _________.

    2 options
  • Two frogs from the same species mate and produce 100 tadpoles and those tadpoles grow up and mate to produce 100 more tadpoles. The offspring are ___________ and ____________.

    2 options
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When two different species mate they can produce a hybrid individual with chromosomes and genetic traits from both species. This can result in "Reduced Hybrid Viability" which means:

1
What is speciation?
Speciation is the ____________ of forming a ________ species. This happens when populations become reproductively _____________ from each other.
Other Answer Choices:
new
process
isolated
1
"Pre" means ___________ .

"Post" means __________
Other Answer Choices:
before
after
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Word Bank: mating after before

Prezygotic barriers: These are barriers that occur _______ zygote formation - i.e. they prevent successful _______.

Postzygotic barriers: These are barriers that occur _______ mating and a zygote or baby has aready formed.
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A zoo wants to assist two related endangered species with their reproduction and plans to directly implant the sperm into the female.

Which type of isolation can NOT be overcome in this way?

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Two species of plants that do not cross-pollinate are an example of _____ isolation because they flower at different times of the year.

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Form of reproductive isolation in which two populations develop differences in courtship rituals or other mating behaviors that prevent them from breeding. Ex. different songs or different colors

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The pollen (sperm) of a flowering plant cannot fertilize the egg cell of a nearby flowering plant of its kind.

What type of reproductive barrier is this?

1

A certain population of flowers only reproduces in the winter. A neighboring species only reproduces in the fall. This is an example of:

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Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of reproductive barrier is this?

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The genitalia of the male damselfly varies in shape. Certain males can only hold onto & mate with females whose genitalia fit.  What type of reproductive barrier is this?

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Based upon what your just read, what are the three possible situations that can occur if two different species mate and the chromosomes do not match?

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When a zebra & horse mate, they create a "zorse". Zorses are most often sterile.

What type of reproductive barrier is this?

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What does it mean to become geographically isolated?

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A population of hares originally lived in a cold climate. Some of them were accidentially onboard a ship, when it left for a tropical island. The two populations became geographically isolated. Doodle what you think the island rabbits would look like after millions of years of evolution.

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According to the reading, what is the difference between sympatric speciation in plants compared to animals?

Make a short bullet point list.
*
*
*

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Sym means "same" and allo means "different". The word patric means "fatherland/countryland". Use these understandings to categorize the following.

  • Allopatric speciation
  • Sympatric speciation
  • A new species arise as a result of geographic isolation.
  • Two subpopulations become reproductively isolated within the same geographic area leading to new species.
4

Speciation is one factor that can cause extinction. State each of the other factors that can cause extinction, using the doodles:

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A mass extinction event is when over _______% of species ________ out in a relatively short period of time. More than 99% of species that have EVER lived are now ____________. Many of these extinctions occurred in a mass extinction event.

The last mass extinction was around 65 ____________ years ago. It wiped out most _____________ species and many animal and plant species. We know this, because these species suddenly disappear from the fossil record at that time. Theories for the cause of this mass extinction include a ___________ impact or huge _____________ eruptions.
Other Answer Choices:
die
volcanic
million
extinct
dinosaur
50
meteor