Natural Selection Vocab

________________ is an explanation of how life has changed over time.

_____________ is an ancestral organism shared by two or more decent lineages.

_____________ is an idea supported by a large amount of scientific evidence

___________________ is a structure that has no function in an organism but did have a function in a common ancestor.

____________________ are structures shared by  organisms that have different structures but the same function.

______________________ are structures shared by organisms that have the same structure but different functions.

________________ is a very early stage of development.

__________________ is a group of organisms that can breed and produce fertile offspring.

________________ is the process whereby organisms better adapted to their environment tend to survive and produce more offspring.

_______________ is a characteristic that gives an organism a better chance of survival.