1.True or False? Extinction is an occurrence only at a species level. 42.True or
ID: 268790 • Letter: 1
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1.True or False? Extinction is an occurrence only at a species level. 42.True or False? Extraterrestrial impacts can dramatically influence the Earth's environment 43.True or False? The Chicxulub crater is small compared to most extraterrestrial im 44.True or False? Dinosaurs did not survive the end of the Cretaceous Period mpacts 45. True or False? Only the Late Cretacecous mass extinction was initinted by meteor or asteroid impacts. 46.True or False? Mammalian radiation was stimulated by the Pangaca breakup during the Triassic Period. 47.True or False? All birds fly, flightless birds do not have feathers. 48.True or False? Cladistics classification nests birds within dinosaurs 49.True or False? Arthropod features like jointed paired appendages and highly developed sensory structures allow them to exploit most ecological habitats. 50.True or False? Extinction of one organism will create opportunities for others. 51. True or False? When resource partitioning is disrupted and habitats overlap, the fitness of individuals will increase because competition in shared resources forces it. S2.True or False? Competitive exclusion results in the extinction of a population due to competition with another species. 52.True or False? Some lineages resulted from genome duplication while others did not. 4.True or False? Variation is the raw material upon which natural selection acts. 55.True or False? The Earth is known to have had two different atmospheres during its history S6.True or False? Approximately 3.5 billion years ago, the first organisms on the planet were the methanogens.Explanation / Answer
41. False. It can occur on species as well as individual level.
42. True.
43. True.
44. True. They extinct at the end of cretaceous period.
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