Download Evolution/Earth*s History Review Part II

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Evolution/Earth’s History Review Part II
Word Bank:
original function
Pd._____ Date_______________________
Earth’s past
similar embryonic material
adaptive radiation
radioactive dating
analogous structures
vestigial structures
punctuated equilibrium
Hox genes
mass extinction
changed over time
continental drift
Only 25%
22. The “Age of __________________” occurred during the Mesozoic Era.
23. The "Age of Mammals" which we are currently in, is called the _______________ Era.
24. ___________________ is a pattern of evolution in which a species evolves at a slow, steady pace.
25. A pattern in which species experience long, stable periods interrupted by brief periods of rapid evolutionary change is called
____________________ _______________________.
26. A single species that has evolved into different forms that live in different ways has undergone ___________ _____________.
27. ______
___________ would most likely result from global temperature drops several degrees after massive volcanic eruptions.
28. _____ _______ are master genes that affect evolution through embryonic development changes that lead to different body plans.
29. The process by which two species evolve in response to changes in each other over time is called ______________________.
30. Many flowers and pollinators like birds, bats, and insects have ____________ ______ _______ together (for example ocotillo
flowers and hummingbirds). This is an example of coevolution.
31. The basic idea of “change over time” is known as _________________.
32. _____________________
______________ is the type of dating is used to determine the absolute age of a rock in years.
33. Scientists date sedimentary rock that is very old by dating the igneous layers above and below the sedimentary layer of interest
(remember the “rock sandwich”). This method is known as __________________________.
34. The vast majority of Earth’s history, about 90%, is taken up by the oldest "era", the ____________________________.
35. Volcanic activity, climate change, and impact events have all led to mass extinctions in ____________ __________.
36. The wings of birds and the flippers of dolphins develop from ______________ ________________ _______________ but
serve different purposes (flight and swimming) and are referred to as vestigial structures.
37. Bats and insects are not closely related but both possess wings, which are used for the common purpose of flight. These
structures are called ___________________ ___________________.
38. Structures inherited from a common ancestor but that have lost most or all of their _____________ _____________, like the
human appendix and those weird third eyelid of cats, are referred to as ___________________ ___________________.
39. ___ mass extinctions have occurred in the Earth's past.
40. Earth’s continental plates can move over time but at a rate of only a few _______________________ a year.
41. ________________________ _______________ is the geological process that is most likely responsible for fossils of
the same species being found on two continents.
42. The half-life of Carbon-14 is about __________
43. After two halves of a radioactive isotope (such as Carbon-14), there is _______ ______ of the radioactive isotope left.
44. Past mass extinctions encouraged the rapid evolution of surviving species by presenting new _____________________.