The Process of Speciation

The Process of Speciation

Assessment

Flashcard

Science

9th - 12th Grade

Practice Problem

Hard

Created by

Barbara White

FREE Resource

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10 questions

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1.

FLASHCARD QUESTION

Front

Speciation Noun

[spee-see-ay-shun]

Back

Speciation


The evolutionary process by which populations evolve to become distinct species that are unable to interbreed and produce fertile offspring.

Example: This image shows different finch species with unique beak shapes, a result of speciation where an ancestral species evolves into new, adapted forms.
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2.

FLASHCARD QUESTION

Front

Gene Pool Noun

[jeen pool]

Back

Gene Pool


The total collection of genes and their different alleles that exist within a particular interbreeding population at a given time.

Example: This diagram shows a population of frogs with different colors and then represents all their genetic variations (alleles) as a collection, defining the gene pool.
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3.

FLASHCARD QUESTION

Front

Reproductive Isolation Noun

[ree-pro-duk-tiv eye-so-lay-shun]

Back

Reproductive Isolation


The inability of members of two populations to interbreed and produce fertile offspring, which is essential for speciation to occur.

Example: This image shows that different flower shapes are suited for different pollinators. This physical barrier, called mechanical isolation, prevents them from interbreeding, keeping them separate species.
Media Image

4.

FLASHCARD QUESTION

Front

Geographic Isolation Noun

[jee-oh-graf-ik eye-so-lay-shun]

Back

Geographic Isolation


A form of reproductive isolation where two populations are separated by physical barriers such as rivers, mountains, or bodies of water.

Example: This diagram shows how finch populations on the Galapagos Islands were separated by the ocean, a geographic barrier that led to the evolution of different species.
Media Image

5.

FLASHCARD QUESTION

Front

Temporal Isolation Noun

[tem-per-ul eye-so-lay-shun]

Back

Temporal Isolation


A form of reproductive isolation that occurs when two or more species reproduce at different times of the day or year.

Example: In May, Species 1 is flowering and ready to reproduce, while Species 2 is still a bud, preventing them from interbreeding.
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6.

FLASHCARD QUESTION

Front

Natural Selection Noun

[nach-er-ul suh-lek-shun]

Back

Natural Selection


The process where organisms with favorable traits are more likely to survive, reproduce, and pass those traits to their offspring.

Example: Giraffes with the advantageous trait of a long neck can reach food and survive, while those with shorter necks cannot. This demonstrates survival of the fittest.
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7.

FLASHCARD QUESTION

Front

Polygenic Traits Noun

[pol-ee-jen-ik trayts]

Back

Polygenic Traits


Traits that are controlled by two or more genes, often resulting in a continuous range of physical characteristics within a population.

Example: The wide variety of colors, shapes, and sizes among these beetles shows variation within a population, which is often caused by polygenic traits.
Media Image

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