Across
- 2. the major changes in body form and structure that takes many thousands of years
- 4. ____ structures are similar structures found in 2 or more different species, it suggests a common ancestor and is evidence of evolution
- 5. is the idea that organisms better adapted to their environment are more likely to survive and reproduce than other members of the same species that don’t have those traits
- 9. this can influence natural selection it is when resources are limited and a species must compete to survive
- 11. a new species can form if one part of a population gets ___ from another
- 13. when organisms die and leave behind preserved remains they are called this
- 16. Darwin felt that Helpful variations would increase in a population while unfavorable ones would ____
- 17. these are small changes that add up to big changes over a long period
- 22. a trait that helps an organism survive and reproduce
- 24. the small gradual changes within a population like size and color
- 26. organisms no longer exists and never will again
- 32. when one organism takes in another and they co-exist
- 33. some species show homologous structure early in ___ development, it suggests a common ancestor and is evidence of evolution
- 35. when saying “survival of the fittest” we really mean the organism is able to live to ___ and pass the favorable traits to offspring
- 36. natural selection is sometimes called “___ of the ____”
- 37. this is when new species evolve during short periods of rapid change
- 38. one of Darwin’s 3 important observations was that Fossils resembled many of the organisms alive _____
- 39. Darwin Found fossils of _____ animals that resembled ____ ones of the day
- 40. one of Darwin’s 3 important observations was that The world has tremendous ______
- 41. when only those organisms with desired traits are selected to reproduce it is called ___ ___
- 42. LUCA stands for this
Down
- 1. Lamarck’s __ __ ____ believed that organisms could change during their lifetime by selectively using or not using parts of their body (not true)
- 3. these look similar to a family tree, it is constructed to show relationships with organisms that are closely related on closer branches
- 6. one of Darwin’s 3 important observations was that Animal species are ____ but have different characteristics to occupy
- 7. when 2 or more species that interact closely can affect each other’s evolution
- 8. this is the random process of a gene (trait) being lost due to something unexpected
- 10. a book Darwin wrote to explain Natural Selection, 5 words
- 12. this early scientist did have some Good ideas: evolution takes place by small gradual steps and that simple organisms could develop over many generations into more complex ones
- 14. ____ structures are structures that have similar function due to organisms living in the same type of environment, it does NOT suggest a common ancestor it is simply a product of adapting to the environment
- 15. “it is not the strongest or most intelligent species that survive, but the one most adaptable to ____” Charles Darwin
- 18. similarities in ___ or the code of life shows evidence for evolution
- 19. this is introducing new genes to a population from new comers coming in
- 20. he developed the first Classification system
- 21. this can influence natural selection; it is the differences between individuals
- 23. this can influence natural selection- when a species produces more offspring than can survive
- 25. she Collected fossils and Realized some animals from the past are not alive anymore
- 27. they think the first ___ cell came into being through endosymbiosis between 2 prokaryotic cells
- 28. _____ in genes cause changes and variations
- 29. His discoveries studying rocks had him estimating Earth was over 300 million years old
- 30. for a mutation to get passed to offspring, the mutation MUST occur in the fertilized ___ ___ of the parent
- 31. ____ ____ are changes in gene “expression” not in the DNA sequences
- 34. organisms sometimes practice ___ ___ in choosing a mate. Maybe they are more brightly colored or make a better nest than another trying to find a mate
- 40. he set out on 5year trip aboard the HMS Beagle as a naturalist