Exam (elaborations)
Exam 1 Bio 107 Study Guide with Complete Solutions
- Course
- Bio 107
- Institution
- Washington State University - Pullman Campus
Exam 1 Bio 107 Study Guide with Complete Solutions
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©PREP4EXAMS@2024 [REAL-EXAM-DUMPS] Monday, July 29, 2024 12:15 PMExam 1 Bio 107 Study Guide with Complete Solutions
macroevolutionary processes - ✔️✔️Large changes which occur over long time periods
and result in new species describe
Ernst Mayr said: - ✔️✔️population or group of populations whose members can
interbreed and produce fertile offspring
reproductive barrier - ✔️✔️interruption in courtship, fertilization, embryo formation or
offspring developmenreproduct
prezygotic barriers - ✔️✔️barriers occur before the formation of the zygote or fertilized
egg
Postzygotic barriers - ✔️✔️occur after the formation of the zygote and reduce the fitness
of a hybrid offspring
Ecological, temporal, and behavioral isolation - ✔️✔️based on species traits relating to
habitat use, activity periods and mating behaviors
Mechanical and gametic - ✔️✔️isolation relate directly to physical structures such as
reproductive organs
Hybrid inviability - ✔️✔️results in hybrid embryos that die soon after fertilization or before
reaching reproductive maturity
Hybrid infertility - ✔️✔️eliminates fitness by producing sterile offspring
Hybrid breakdown - ✔️✔️results in breakdowns in fitness among hybrids over successive
generations
allopatric, parapatric, and sympatric - ✔️✔️Various geographic circumstances resulting in
speciation are distinguished as
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, ©PREP4EXAMS@2024 [REAL-EXAM-DUMPS] Monday, July 29, 2024 12:15 PM
Allopatric speciation - ✔️✔️occurs when a physical barrier separates a population into
two or more groups
Parapatric speciation - ✔️✔️occurs when members of a population enter a new habitat
bordering the range of the parent population
Sympatric speciation - ✔️✔️occurs when populations diverge while living in the same
physical area
gradualism - ✔️✔️whereby evolution proceeds in small, incremental changes over many
generations
Stephen Jay Gould and Niles Eldredge described punctuated equilibrium, - ✔️✔️which
described a pattern of relatively brief bursts of rapid evolution followed by long periods
of little change
Opportunity may arise following - ✔️✔️* extinction of a dominant group
*By colonization of a novel environment (usually an island)
*Appearance of new resources
Evolution of a key innovation
adaptive radiation - ✔️✔️rapid filling of niches following ecological opportunity is termed
an
Ecomorph - ✔️✔️describe categories of habitat use and associated morphology and
behavior
rate of extention - ✔️✔️0.1-1 species extinction per million years (the average time of
existence for a species being 1-10 million years)
How does mass extictions happen - ✔️✔️1. Impact theory
2. shifts in tectonic plates
Evolution - ✔️✔️change in heritable
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