I
a diagram that shows how scientists think different groups of organisms are related
branching tree
similar structures that related species have inherited from a common ancestor
homologous structures
a theory that states that species evolved during short periods of rapid change
punctuated equilibria
a theory that proposes that evolution occurs slowly but steadily
gradualism
a technique that allows scientists to determine the actual age of fossils
absolute dating
the time it takes for half of the atoms in a radioactive element to decay
half life
Scientists use this to determine just which of two fossils is older
relative dating
when a mold becomes filled with hardened minerals it can form a
cast
a hollow space in sediment in the shape of an organism or part of an organism is called a
mold
when minerals replace the remains of an organism and change them to rock, they become a
petrified fossil
Elephants have began evolving without what, to help protect them from poachers
tusks
the process by which individuals are better adapted to their environment and are more likely to survive and reproduce than other members of the same species
natural selection
up to how many years could you spend in prison for cutting down a cactus in Arizona?
up to 25 years
a group of similar organisms that can mate with each other and produce fertile offspring
species
a well tested concept that explains a range of observations
scientific theory
a trait that helps an organism survive and reproduce
adaptation
was the real buddah fat or skinny
skinny
over millions of years, layers of sediment harden to form
sedimentary rock
Who invented the spiked dog collar and why?
Ancient Greeks
to protect their dogs from wolf attacks
what is a single strand of spaghetti called
a spaghetto
preserved remains or traces of an organism that lived in the past
fossil
what is the name of the offspring of a polar bear and grissly bear
pizzy bear
how did jack daniel die
any difference between individuals of the same species
variation
the actor who plays spongebob has been married since 1995 to which other character on spongebob?