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UCSD BILD 3 Final Exam Questions & Answers 2024/2025
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UCSD BILD 3 Final Exam Questions & Answers 2024/2025 descent with modification - ANSWERSover time traits that have a reproductive advantage become more popular within a population divergence - ANSWERSdifferent forms or structures of related species evolving differently to adapt to various e...

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  • 22 de octubre de 2024
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  • 2024/2025
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UCSD BILD 3 Final Exam Questions &
Answers 2024/2025

descent with modification - ANSWERSover time traits that have a reproductive advantage become more
popular within a population



divergence - ANSWERSdifferent forms or structures of related species evolving differently to adapt to
various environments



limits on population growth - ANSWERSpredation

starvation

emigration

habitat loss

pathogens/parasites

fire/flood/drought



natural selection - ANSWERSvariation in a heritable characteristic that affects survival or reproduction



principle of succession - ANSWERSliving organisms are similar to fossils in their regions because they
descended from those same ancestors with modification



Darwin's inferences - ANSWERS1. All species are related to a common ancestor

2. Evolutionary modification happens when organisms find themselves in new environments and adapt
to those new environments via natural selection

3. The diversity on Earth has to do with how old the planet is



adaptive radiation - ANSWERSdiversification of species from common ancestor to fill wide range of
ecological niches

, artificial selection - ANSWERSselecting for traits that are useful for humans



Alfred Russel Wallace - ANSWERSCollected beetles

4 years in amazon

Noticed that isolation + time = divergence



microevolution - ANSWERSShort time scales

Change in the genetic composition of a population across generations



macroevolution - ANSWERSchange in composition of species over time

microevolution + millions of years = macroevolution



fossilization - ANSWERSusually found in sedimentary rocks



stratigraphy - ANSWERSyounger fossils on top, older on bottom



Tiktaalik roseae - ANSWERSscaly fossil fish

Found in Canadian arctic

transitional between fish and tetrapods

probably a relative of the ancestor of modern tetrapods



Archaeopteryx - ANSWERStransitional form between dinosaurs and birds from late Jurassic



Extinction - ANSWERSWiping out of a species

Controversy of extinction ended with discovery of Irish elk



vestigial structures - ANSWERSFunctionless structure in one species that has an important function in
another, related species

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