What are homologous structures?
Evolution and Ecology Review

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Biology
•
9th - 10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Structures in different species that share a common ancestry but have different functions. Example: The forelimbs of humans, whales, and bats.
2.
FLASHCARD QUESTION
Front
Define ecosystem.
Back
A collection of organisms that make up a community along with all the nonliving aspects of the environment.
3.
FLASHCARD QUESTION
Front
What is geographic isolation?
Back
The separation of a group of individuals from the rest of the population, often leading to speciation.
4.
FLASHCARD QUESTION
Front
What does extinction mean?
Back
The complete dying out of a species.
5.
FLASHCARD QUESTION
Front
Explain natural selection.
Back
The process by which individuals better suited to their environment survive and reproduce, passing their genes to the next generation.
6.
FLASHCARD QUESTION
Front
What are vestigial structures?
Back
Body parts that have lost their original function through evolution. Example: The human appendix.
7.
FLASHCARD QUESTION
Front
Define adaptation.
Back
A trait that helps an organism survive and reproduce in its environment.
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