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Fossil Record

Fossil Record and Evolution

TermDefinition
Evolution Change in heritable traits over successive generations.
Law of Superposition The principle that sedimentary rock layers are older than the rock layers that are above it and younger than the rock layers below it.
Ontogeny The development of a species through its life cycle
Phylogeny The relationship of a species through a common ancestor.
Fossil Any preserved evidence of a past geologic age; usually found in sedimentary rock.
Index Fossil A fossil used to determine the age of a rock layer.
Cladogram A diagram that shows relationships between species.
Common Ancestor An ancestor that is shared by two or more organisms.
Relative Age The age of an object in relation to the ages of other objects.
Absolute Age The numeric age of an object or event, often found by using radiometric dating.
Embryos that have a closer related form means.... they share a more recent common ancestor.
In closer related forms, the earlier stages of embryos are... more similar than later stages.
Fossils can provide evidence of.... past climates, past ecosystems, past behaviors, mountain building, and past biodiversity.
The shape of fossil leaves can tell us of.... past climate.
Percentage of species that have gone extinct. Over 90 %
Finding reef fossils in the desert provide what type of evidence? The area was once covered by an ocean.
What can pollen fossils tell us about the past? The type of plants that lived there.
Extinction When a species dies off from the earth.
Ernst Haeckel Biologist and artist whose drawings show a commonality in embryology.
Embryology The study of embryos and their development.
Created by: cook2sm
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