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7th Grade Evolution Word Scramble

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Biology Lab Midterm

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Question	Answer
adaptation	a characteristic that helps an organism survive and reproduce in its environment
species	a group of organisms that can mate with one another to produce fertile offspring
evolution	the process by which populations accumulate inherited changes over time
fossil	solidified remains or imprints of a once-living organism
plate tectonics	forces that the movement of pieces of the earth's crust around the surface of the planet
fossil record	fossils that provide a historical sequence of life
vestigial structure	the remnant of a once-useful anatomical structure
trait	a quality that can be passed on from 1 generation to another
selective breeding	breeding of organisms that have a certaib desired trait
natural selection	process by which organisms with favorable traits survive and reproduce at a higher rate thatn organisms without the favorable trai
mutation	a change in the order of the bases of DNA
generation time	period between the birth of 1 generation and the birth of the next generation
speciation	process by which 2 populations of the same species become so different that they can no longer interbreed
extinct	a species of organism that has died out completely
What are the 4 geological time eras?	Precambrian Time, Paleozoic Era, Mesozoic Era, and the Cenozoic Era
What are the 3 ways you can compare organisms?	skeletal structures, DNA and the embyonic structures
What kind of rock are fossils found in?	sedimentary rock
3 types of rock	metamorphic, sedimentary, and igneous
Who made observationthat later became the foundations for his theory of evolution by natural selection?	Charles Darwin
What are the 4 steps to Natural Selection?	Overproduction, Genetic Variation, Struggle to Survive, and Successful Reproduction
What are the 3 steps to the formation of a new species?	seperation, adaptation, and division
relative dating	ordering fossils to estimate their age
absolute dating	the method of measuring the ratio of unstable atoms to stable atoms, whichhelp determine the approximate age of a fossil
geolic time scale	the calendar scientists use to outline the history of life on earth
Pangaea	a single large landmass of the earth
What are some possible forces that cause the Earth's crust to move?	volvanic eruptions and earthquakes
hominid	a human and their human-like ancestors
What is similar about hominids?	they both have an opposable thumb
What are different between hominids?	Their pelvis is different and their arms are longer