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18-19 Bio I: Evolution

Across
The time it takes for 50% of the sample to decay into a more stable element
Test used to estimate the age if a fossil
When an animal copies the form of something else, type of camouflage
Radioactive element used for dating fossils no older than 100,000 years
Variety of organisms that inhabit the Earth
Type of camouflage, when an animal blends in with its environment
Behavior or physical characteristics that allows an organism to survive and reproduce in its environment
When an organism's color is broken up with a pattern, like stripes or spots, so it confuse or conceals when alone or group
A trait that makes it very hard to see an animal in its natural habitat
British naturalist who formulated the theory of evolution by natural selection
The preserved remains or trace of an organism that lived in the past
Any difference between organisms of the same species
Any change in the DNA of an organism
Used to measure how similar base pairs are between species, helps to show how species are related
Down
Last common ancestor for a trait
The disappearance of all members of a species from Earth
Stage of life that is used to show similarities between living creatures
Similar structures that related species have inherited from a common ancestor
Geologic time period with organisms made of soft bodies that did not fossilize well
Gaps in the fossil record
A process by which individuals that are better adapted to their environment are more likely to survive and reproduce than others that are not
Possible LUCA for teeth
The gradual change in species overtime