2526 Unit 1 Review - Bio

Front

What does a cladogram illustrate about species relationships?

Back

A cladogram shows the evolutionary relationships between species, indicating which species share a more recent common ancestor.

Front

What does it mean if two species share a more recent common ancestor?

Back

It implies that the two species are more closely related to each other than to other species that do not share that ancestor.

Front

What is the significance of embryonic similarities between different species?

Back

Similarities in embryos suggest that the species share a common ancestor.

Front

What is variation in the context of evolution?

Back

Variation refers to the differences in traits among individuals of the same species, which can lead to natural selection.

Front

What are homologous structures?

Back

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

Front

What is the role of vestigial structures in evolution?

Back

Vestigial structures are remnants of organs or structures that had a function in an early ancestor but are no longer useful in the current organism.

Front

What is a bottleneck event in population genetics?

Back

A bottleneck event occurs when a population's size is significantly reduced, leading to a loss of genetic diversity.

Front

What is the founder effect?

Back

The founder effect occurs when a small group of individuals establishes a new population, leading to reduced genetic variation.

Front

What evidence supports the theory of evolution?

Back

Evidence for evolution includes fossil records, homologous structures, embryology, and vestigial structures.

Front

What is natural selection?

Back

Natural selection is the process by which individuals with favorable traits are more likely to survive and reproduce.