evolution

Question 1

evolution

Answer 1

change in a population over time

Question 2

criteria for natural selection

Answer 2

1 variation i the population
2 competition for resources
3those wight the best fit traits will survive and reproduce

Question 3

adaptation

Answer 3

a genetic trait that helps an organism survive and/or reproduce in its environment

Question 4

descent with modification

Answer 4

all organisms today evolved from a common ancestor.

Question 5

ways of evidence for evolution

Answer 5

fossil records, comparative anatomy, genetics, embryology, geographic distribution on species, antibiotic resistance

Question 6

fossil record

Answer 6

fossils show that life is old and has changed over time

Question 7

transition species

Answer 7

fossils that show the link between old and new species

Question 8

vestigial organs

Answer 8

left over organs from ancestors that we no longer use but still have, example: wisdom teeth, appendix

Question 9

homologous structure

Answer 9

structures built the same but have different functions
ex; whale fin, bat wing, human arm
shows ancestry

Question 10

embryology

Answer 10

early embryos of different species have similar features, ex fish and humans have tails and gils

Question 11

genetic proof of evolution

Answer 11

best way to show– closely related species share DNA codes ex: humans and chimps share 98.8%

Question 12

analogous structures

Answer 12

structures have same function but different structure, does not show ancestry
but shows that environments select for certain trays– dolphin and shark fins