Selective Breeding Crossword

_________ are the remains of organisms preseved in the earth.
___________ ___________ are organisms made up of one cell.
____________ __________ are organisms made up of multiple cells.
When large amounts of species die in a short period of time.
when a species changes over time.
a scientist named _______ was the first to propose a model of how species evolve.
memmbers of a species that are best suited to their environment survive and reproduce at a higher rate than other members of the species this is called ___________________
An ___________ is any inherited trait that gives an organism an advantage in its particular environment.
_________________ is the evolution of new species from an existing species
An ________ is a early form of an organism from which later forms descend.
_____________ are physical structures that were fully developed and functional in an ancestral group of organisms but are reduced and unused in the later species.
A __________ is a segment of DNA that relates to a specific trait or function of an organism.
About 250 million years ago, approximately 90 percent of the species living in the ocean became extinct.
Darwin studied __________
Within a species there are natural differences, or ___________, in traits.
A scientific _________ is a statement based on observation and experiment.
many different species share similar ____________
____________ contains the information all organisms need to grow and to maintain themselves.
evolution involves a change over a long ___________
Darwin studied evolution on the ____________________________