APES Exam Study guide - Pasing Grades

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APES Exam Study guide

64. Nonnative Species: Introduced to area: can be either endemic (found only within a particular region) orindigenous(found both within the region and elsewhere) 65. Endemic Species: plants and animals that exist only in one geographic region. 66.Indicator Species: indicates if levels of something are off in environment, ex lichen 67. Keystone Species: a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically. (Alligator) 68. Foundation Species: used to refer to a species that has a strong role in structuring a community.( kelp, whose existence provide shelter and suitable habitat for numerous other organisms in marine ecosystems) 69. Extinction: the state or process of a species, family, or larger group being or becoming extinct. 70. Fossils: the remains or impression of a prehistoric organism preserved in pet- rified form or as a mold or cast in rock. 71. Generalist Species: able to thrive in a wide variety of environmental conditions and can make use of a variety of different resources 72. Specialist Species: able to thrive in limited environmental conditions 73. Species: a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. 74. Speciation: the formation of new and distinct species in the course of evolution. 75. Species Diversity: the measure of diversity in an ecological community 76. Theory of Evolution: is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits 77. Mutations: the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. 78. Freshwater: not of the sea 79. Rivers: a large natural stream of water flowing in a channel to the sea, a lake, or another such stream. 80. Source Zone: headwater or mountain highand streams of cold, clear water rush over waterfals and rapids. 81. Transition Zone: the headwater streams merge to form wider, deeper streams that flow down gentler slopes with fewer obstacles. 82. FloodplainZone:streamsjoin into wider and deeperriversthat meander across broad, flat valleys.

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