Evolution
The change of characteristics of a species over several generations.
What is evolution?
This type of rock is the most common to hold fossils.
What is sedimentary rock?
Fossilization happens under this type of condition.
What is specific?
The fossil that led to the idea of a transitional species was found in what type of rock?
What is sedimentary?
This is the definition of a "short period of geological time."
What is 2.8 million years?
Where life on Earth started.
What is in the water?
The type of scientist that is primarily responsible for creating the fossil record.
What is a paleontologist?
Fossils tell us about the shape and this of an organism.
What is size?
The part of Wisconsin that would most likely have conditions similar to that of Redhill, Pennsylvania?
What is the south western part of the state?
The percent of species that must become extinct to count as a mass extinction.
What is 75%?
The organism that was used in the evolution lab.
What is a bee?
This is a way of dating pieces of the geologic history when rock layers may not be useful.
What is radiometric dating?
This type of fossil record happens when the sediment turns to rock AROUND an object allowing the object to decay and leave an impression.
What is a mold?
The country that Dr. Shubin spent summers looking for the transitional species.
What is Canada?
The number of known mass extinctions.
What is 5?
All terrestrial vertebrates have a common ancestry with this creature.
What is Tiktaalik?
Horizontal layers of sedimentary rock.
What is rock strata?
This is a permanent and studyable object from a fossilized impression.
What is a cast?
At this stage of development, it is hard to tell a human from a monkey, chicken, or even fish.
What is an embryo?
The result of biodiversity after a mass extinction.
What is an increase?
A mistake when reproducing/replicating that is often the main cause of evolution.
What is a mutation?
Rock strata is typically layered in this order.
What is chronologically?
This is the slow and careful process needed to "harvest" fossils to prevent them from being damaged.
What is excavation?
Tiktaalik has the first fossil evidence of this particular structure?
What is a neck?
The largest mass extinction known was this many million years ago.
What is 250?
The ________ of the organism sometimes increases as evolution progresses.
What is complexity?
This isotope is commonly used to date relatively "young" artifacts.
What is C14?
This process happens to the bones of an organism to produce a fossil.
What is mineralization?
Tiktaalik is the first creature to show this type of limb pattern?
What is "one two many digits?"
This gives us evidence of mass extinctions.
What is the fossil record?
The evolution of this structure allowed organisms to bear weight on their forelimbs.
What is a wrist?
This isotope is commonly used to date fossils.
What is U238?
It is uncommon to find this kind of skeleton because of scavengers and erosion.
What is complete?
Human gills transition into these parts.
What are ears, throat (voice box), and lower jaw?
The primary causes of mass extinction.
What is an asteroid impact?
The gene that allows for the formation of digits.
What is Sonic Hedgehog?
The rate of decay of Radioactive isotopes that allows them to be used to measure the age of a fossil or rock layer.
What is a constant rate of decay?
This kind of organism has fossils that are more common because of where it lived.
What is marine (sea dwelling)?
Tiktaalik is considered the transitional species between these two types of animals?
What is fish and tetrapods?
This "explosion" after a mass extinction was caused by an increase of oxygen in oceans.
What is the Cambrian explosion?