2526 Unit 1 Review - Bio

Flashcard
•
Biology
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
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.
2.
FLASHCARD QUESTION
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.
3.
FLASHCARD QUESTION
Front
What is the significance of embryonic similarities between different species?
Back
Similarities in embryos suggest that the species share a common ancestor.
4.
FLASHCARD QUESTION
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.
5.
FLASHCARD QUESTION
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.
6.
FLASHCARD QUESTION
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.
7.
FLASHCARD QUESTION
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.
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