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BIOS 195 3rd Lecture Exam
- Microevolution
- Microevolution
- Macroevolution
- Macroevolution
- Mass Extinction
- Large-scale volcanism, asteroid impact, climate change
- Ordovician-Silurian Extinction
- Late Devonian Extinction
–Answer Small-scale changes in gene frequencies, happens in a few generations within species/populations.
–Answer Small evolutionary changes which are observable and can be tested through experiments (experimental evidence). Less controversial
–Answer Large-scale changes in gene frequencies that occurs over a longer period of time to above level of species.
–Answer An extended microevolution which is identified in fossil evi- dence. More controversial
–Answer occurs constantly which causes wiping out of ecosystems, disruption of energy flow, and collapse of food webs
–Answer What are the causes of mass extinction?
–Answer 86% loss of life; glaciation and heating event; plant life removed CO2 from the air causing global cooling and glacier formation
–Answer 1 / 2
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75% loss of life; terrestrialization of plants resulted in the consumption of oxygen by algal blooms, leading to suffocation. Glaciation and a fall in sea level occurred, leading to habitat loss
- Permian-Triassic Extinction
- Triassic-Jurassic Extinction
- Cretaceous-Paleogene Extinction
- Holocene Extinction
- Provided ecological opportunities for organisms (new habitat); rapid evo- lution making
- adaptive radiation
- Divergent evolution
–Answer 96% life lost; Volcanic activity led to massive amounts of CO2. Bacteria began to thrive on CO2, producing methane, making the oceans and rain acidic (toxic environment)
–Answer 80% life lost; Volcanic eruptions spewed tons of CO2, trapping heat and acidification of the ocean.
–Answer A mass disaster caused by an asteroid that struck the earth approximately 66 million years ago and killed 75% of life on Earth, including all terrestrial dinosaurs.
–Answer Currently happening; Caused by anthropogenic activity.
new species –Answer What are the effects of mass extinction
–Answer Diversification due to new ecological niches; New lineages have different adaptations compared to their common ancestor
–Answer when two or more species sharing a common ancestor become more different over time
16. TRUE
–Answer True or False
- / 2