8.2 Speciation

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Draggable item		Corresponding Item
Prezygotic Barriers		Formation of a new & distinct species
Postzygotic Barriers		Prevent fertilization from occurring
Allopatric Speciation		Prevent hybrid offspring from being viable/fertile
Sympatric Speciation		New species arise due to geographical isolation
Speciation		New species arise due to reproductive isolation

8.2 Speciation

8.2 Speciation

Match the term with the best description for each

A new river forms and splits two populations, causing ______________ speciation

The emergence of a mountain range is an event that would lead to _______________ speciation

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again.

What type of reproductive barrier is this? What type of speciation may occur as a result of this event?

In some species of snails, the direction in which their shells spiral (right-handed or left-handed) prevents mating. A right-handed shell species and a left-handed shell species cannot mate because their reproductive organs are misaligned.

Which of the following describe(s) the situation above?

In some species of cotton (Gossypium), hybrids between different species may initially be fertile and robust, but their offspring (the second generation) are weak and sterile.

Which of the following describe(s) the situation above?

Gradualism is the idea that evolution happens slowly and steadily over long periods, with small, incremental changes accumulating over time.

Which of the following example(s) demonstrate the idea of gradualism?

Which of the following statements are true about the adaptive radiation of mammals following the P/K extinction event?
(Select all that apply)

What type of selection is shown in graph 1?

What type of selection is shown in graph 2?

What type of selection is shown in graph 3?

8.2 Speciation

8.2 Speciation

Match the term with the best description for each

A new river forms and splits two populations, causing ______________ speciation

The emergence of a mountain range is an event that would lead to _______________ speciation

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this? What type of speciation may occur as a result of this event?

In some species of snails, the direction in which their shells spiral (right-handed or left-handed) prevents mating. A right-handed shell species and a left-handed shell species cannot mate because their reproductive organs are misaligned.Which of the following describe(s) the situation above?

In some species of cotton (Gossypium), hybrids between different species may initially be fertile and robust, but their offspring (the second generation) are weak and sterile. Which of the following describe(s) the situation above?

Gradualism is the idea that evolution happens slowly and steadily over long periods, with small, incremental changes accumulating over time.Which of the following example(s) demonstrate the idea of gradualism?

Which of the following statements are true about the adaptive radiation of mammals following the P/K extinction event?(Select all that apply)

What type of selection is shown in graph 1?

What type of selection is shown in graph 2?

What type of selection is shown in graph 3?

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again.

What type of reproductive barrier is this? What type of speciation may occur as a result of this event?

In some species of snails, the direction in which their shells spiral (right-handed or left-handed) prevents mating. A right-handed shell species and a left-handed shell species cannot mate because their reproductive organs are misaligned.

Which of the following describe(s) the situation above?

In some species of cotton (Gossypium), hybrids between different species may initially be fertile and robust, but their offspring (the second generation) are weak and sterile.

Which of the following describe(s) the situation above?

Gradualism is the idea that evolution happens slowly and steadily over long periods, with small, incremental changes accumulating over time.

Which of the following example(s) demonstrate the idea of gradualism?

Which of the following statements are true about the adaptive radiation of mammals following the P/K extinction event?
(Select all that apply)