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Bio I: Evolution 18-19


Across
The number of years it takes for half of a radioactive chemical to turn into a stable chemcial
Differences between organisms of the same species
Drives evolution, fittest organisms survive
LUCA for teeth
Change in the DNA of an organism
Type of camouflage when a pattern like stripes or spots is used to confuse other organisms
Physical characteristic that demonstrates how certain species are related through a common ancestor
Discovered traits were inherited from parents
Historical record provided by fossils
Period of geologic time when most organisms were soft-bodied and did not make many fossils
Gap in the fossil record
A trait that evolved to make an animal hard to see in its natural habitat
When the entire population of a species dies off
The radioactive element with a half-life of 5,700 years
Factor affecting natural selection where different species fight over resources
Down
Change in species over time
The variety of species on Earth
Transitional fossil connecting dinosaurs and birds
Organism that exhibits traits common to both an ancestral group and its descendants
Type of rock where fossils are commonly found
Factor affecting natural selection that limits the number of offspring produced
Type of camouflage when an animal blends in with its background
Preserved remains or traces of an organism that lived in the past
Age of Earth
Acronym for the first living thing that was the ancestor to all creatures
When an animal copies or mimics the form of something else