20 questions
Behavior or physical characteristic that allows an organism to survive or reproduce in its environment
adaptation
fossil
species
vestigial structure
This is a diagram that shows how scientists think different groups of organisms are related. It can be referred to as a cladogram or phylogenic tree.
Fossil
Variation
Fossil Record
Branching Tree
Type of fossil that forms when mold becomes filled with minerals that then harden.
petrified fossil
preserved remains
cast
mold
Gradual change of a species over time
Heredity
Evolution
Natural Selection
Scientific Theory
Disappearance of all the members of a species from Earth
evolution
fossil
variation
extinction
Preserved remains or traces of an organism that lived in the past
fossil record
species
fossil
adaptation
Millions of fossils that scientists have collected
scientific theory
fossil record
vestigial structure
natural selection
Theory that evolution occurs slowly but steadily
natural selection
gradualism
relative dating
branching tree
Time it takes for half the atoms in a radioactive element to decay
gradualism
half life
quarter life
punctuated equilibria
Body parts that are structurally similar in related species ant that provide evidence for a common ancestor.
petrified fossil
homologous structure
variation
vestigial structure
Type of fossil formed when a shell or other hard part of an organism dissolves, leaving an empty space in the shape of the part.
vestigial structure
mold
homologous structure
cast
Process by which individuals that are better adapted to their environment are more likely to survive and reproduce than others of the same species
punctuated equilibrium
adaptation
natural selection
artificial selection
Fossil formed when minerals replace all or part of an organism
punctuated fossil
preserved fossil
petrified fossil
natural selection
Theory that species evolve during short periods of rapid change
Gradualism
Punctuated Equalibria
Preserved Remains
Natural Selection
Technique used to determine the actual age of a fossil on the basis of the amount of radioactive element it contains
radioactive dating
absolute dating
natural dating
relative dating
Technique used to determine which of two fossils is older
radioactive dating
relative dating
natural dating
absolute dating
Well-tested concept that explains a wide range of observations
scientific theory
evolution
scientific law
variations
Group of organisms that are physically similar and can mate with each other and produce offspring that can also mate and reproduce
variations
species
molds
casts
Any difference between individuals of the same species
adaptations
evolution
variations
homologous structures
Historical remnants of a structure that was thought to have greater importance in its’ ancestors, but has little importance now
homologous structures
petrified fossil
vestigial structures
preserved remains