Change Over Time Level 1

Which of the following do some scientists believe shows evidence for evolution in living species?

• homologous structures

• analogous structures

• vestigial structures

• all of the above

____ are remains of life from an earlier time

• sedimentary rocks

• fossils

• variations

• limestones

Define natural selection.

• An inherited trait that increases an organism’s chance of surviving and reproducing in its environment.

• A slight difference in an inherited trait of individual members of a species

• A person who studies nature selectively

• The process by which populations of organisms with variations that help them survive in their environment, live longer, and go on to reproduce

Define adaptations

• An inherited trait that increases an organism’s chance of surviving and reproducing in its environment

• The resemblance of one species to another

• The breeding of organisms for desired characteristics

• A slight difference in a species

What is natural selection?

• The process by which humans breed a species for certain traits

• The process in which inherited traits of a population change over many generations

• The process by which Charles Darwin noted the differences in finches while visiting the Galapagos Islands

• The process by which individuals that are better adapted to their environment are more likely to survive and reproduce

What is evolution?

• a group of organisms that can mate to produce fertile offspring

• the process in which inherited traits of a population change over many generations

• the process by which individuals that are better adapted to their environment are more likely to survive and reproduce

• a trait that allows organisms in a population to better survive and reproduce in their environment

a group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce

• species

• variations

• evolution

• organism

any difference between individuals of the same species

• inheritance

• variation

• alleles

• DNA

the process by which modern organisms have descended from ancient organisms

• species

• fossils

• evolution

• growth

the preserved remains or traces of an organism that lived in the past

• fossil

• sedimentary rocks

• radioactive decay

• fuels