Checking Your Understanding: Speciation

Checking Your Understanding: Speciation

Assessment

Flashcard

Biology

9th - 12th Grade

Hard

Created by

Adriana Sanchez

FREE Resource

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14 questions

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1.

FLASHCARD QUESTION

Front

Primary cause of speciation

Back

Reproductive isolation

Answer explanation

Media Image

While it is the predominant way we classify species, this is only based on the biological definition of speciation.

2.

FLASHCARD QUESTION

Front

Definition of speciation relating any two species over time

Back

Phylogenetic Speciation

Answer explanation

Media Image

Because phylogenetic looks at species who have a common ancestor, you could theoretically trace back all species to a common unicellular species.

3.

FLASHCARD QUESTION

Front

Geographic separation of squirrels

Back

Formation of the Grand Canyon

Answer explanation

The correct choice explains that the Grand Canyon geographically separated members of a single squirrel species, leading to the development of two similar species on either side due to isolation and evolutionary divergence.

4.

FLASHCARD QUESTION

Front

Speciation type for similar squirrels in Grand Canyon

Back

Allopatric

Answer explanation

Allopatric speciation occurs when populations are geographically separated, leading to the development of distinct species. The squirrels on opposite sides of the Grand Canyon likely evolved separately due to this geographic barrier.

5.

FLASHCARD QUESTION

Front

Population divided by a new river

Back

Allopatric Speciation

Answer explanation

When a population is divided by a physical barrier, like a river, it leads to Allopatric Speciation. This process occurs as the separated groups evolve independently, potentially resulting in the formation of new species.

6.

FLASHCARD QUESTION

Front

Speciation type of apple maggot flies

Back

Sympatric - not separated by location

Answer explanation

This is an example of sympatric speciation because the apple maggot flies are not separated by location. They have diverged into two groups based on their host fruit preferences, leading to reproductive isolation despite living in the same area.

7.

FLASHCARD QUESTION

Front

Speciation requires:

Back

Isolation

Answer explanation

In speciation, isolation is crucial as it prevents gene flow between populations, allowing them to evolve independently. This can lead to the development of new species over time, making isolation the key factor in the speciation process.

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