Mass Extinctions
This was the result of the Cretaceous–Tertiary extinction that occurred about 65 million years ago
This is what all 5 major mass extinctions and the 6th major mass extinction even have in common.
What is climate change?
The process in nature where organisms adapt and change in response to their environment
What is natural selection?
The change in heritable traits in a population over generations
What is evolution?
What is climate change?
This event is believed to have been triggered by massive volcanic eruptions, which led to global warming, ocean acidification, and other environmental changes
What is the end Triassic
This is the primary difference between the first five mas extinctions and the 6th
Natural selection cannot occur without this in a population
What is variation?
These can all be causes of evolution.
What are natural selection, genetic drift, gene flow and mutations?
This occurs when 75 % of the total number of species on the Earth at the time are wiped out.
What is a mass extinction?
Of the 5 mass extinctions, which was the largest and what are the proposed causes?
What is the Permian–Triassic extinction and the causes could have been the impact of a comet or asteroid, and plate movements
Humans are causing the 6th major extinction event through (name 2 ways)
What are:
- degradation and destruction of environment
- over exploitation of other species
- introduction of alien species
- anthropogenic climate change
Natural selection cannot occur for a trait unless that trait is...
What is heritable?
A single organism can evolve
What is a common misconception about evolution?
The answer is iridium and shocked quartz in the sediment layers
What is evidence for the asteroid impact that caused the K-T mass extinction event
What caused the End Triassic extinction to occur
What are massive floods of lava erupting and climate change
What is the fact that the extinction rate of all types of organisms is 100-1000 times faster than the normal background rate of extinction?
Examples of this are predation and competition for resources.
What are selection pressures?
Organisms that are closely related share DNA sequences in common and often have traits that came from a common ancestor
What is evidence of evolution?
All previous 5 major mass extinctions led to this occurring
What is the domination of new species filling vacant ecological niches?
What are variations in Earth's orbital parameters and massive volcanic eruptions could have caused global cooling and changes in ocean chemistry the causes of?
What is the Late Devonian extinction event?
What is
-the extinction rate began to increase sharply at the same time as the industrial revolution started, which is when we really started changing our environment.
- we can measure and observe the effects of human activities on species
Individuals with an advantageous trait have a better change of surviving. This is known as...
What is differential reproductive success?
An example of evolution that did not occur by natural selection. (looking for terms)
What is genetic drift? Artificial selection?
This can impact the climate and the distribution of biodiversity
What is continental drift?