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