Natural Selection

Front

What are vestigial structures?

Back

Vestigial structures are body parts that have lost their original function through evolution. They are believed to be related to an ancestor that once used the body part.

Front

What is natural selection?

Back

Natural selection is the process in which populations change over time, where individuals with traits better suited to their environment are more likely to survive and reproduce.

Front

Why is there not a complete fossil record of all life?

Back

There is not a complete fossil record because fossil formation requires specific conditions, fossils must be exposed to be found, and they can be destroyed by erosion or other geological processes.

Front

What condition allows a rabbit population to evolve by natural selection?

Back

Some rabbits are resistant to a disease, and they pass this resistance to their offspring, allowing the population to evolve.

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What is meant by 'survival of the fittest'?

Back

'Survival of the fittest' refers to the process of natural selection, where individuals better suited to their environment survive and reproduce more successfully.

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What are homologous structures?

Back

Homologous structures are body parts in different species that share a common ancestry, even if they have different functions.

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What are analogous structures?

Back

Analogous structures are body parts in different species that serve similar functions but do not share a common ancestry.

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What is extinction?

Back

Extinction is the end of an organism or a group of organisms, meaning that no individuals of that species remain alive.

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What is speciation?

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Speciation is the process by which new species arise from existing species, often due to evolutionary changes.

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What is artificial selection?

Back

Artificial selection is the process by which humans breed plants and animals for specific traits.