Speciation event - Study guides, Class notes & Summaries

A population of rodents, called population A, lived on a large landmass. One group of the population dispersed to a nearby island. Two million years later, the island population split into two smaller, equalsized populations when a river formed across the middle of the island. Now two new species, A1 and A2, have evolved on the island. They have replaced the population from which they were derived. Use the image to answer the question.Which diagram represents the phylogeny of the populations ...

AP Bio Evolution Latest Update Already Graded A adaptive radiation rapid speciation of a single or a few species to fill many ecological niches allopatric speciation when populations physically separated by an extrinsic barrier evolve so that if the barrier breaks down, they can't breed artificial selection the intentional breeding of certain characteristics over others balanced polymorphism natural selection maintaining polymorphisms in a population bottleneck effect an evol...

JMU BIO 150 Exam 2 Define macroevolution ️evolutionary change above the species level, including the origin of a new group of organisms or a shift in the broad pattern of evolutionary changes over time How do we identify a species? ️groups of actually or potentially interbreeding populations that are reproductivley isolated from other such groups Define reproductive isolation ️cannot produce viable offspring Define viable ️offspring can reproduce Define speciation ️splitt...

Coevolution Event The process by which two or more species evolve in tandem by exerting selection pressures on each other Speciation Event A lineage-splitting event that produces two or more separate species. Phylogenetic Event The evolutionary development and history of a species or higher taxonomic grouping of organisms. Also called phylogenesis. The evolutionary development of an organ or other part of an organism Homology Event Shared trait among species Mutation A Mutation occur...

Selection - ANSWER-Alleles split into two groups First alleles = favored and increase in frequency Second alleles = disfavored and decrease in frequency Genetic Drift - ANSWER-Change in allele frequency due to chance Exs: Founder Effects & Genetic Bottleneck Gene Flow - ANSWER-Movement of alleles between populations Mutation - ANSWER-Creates new alleles to restore genetic diversity Around 1 in every 10,000 gametes produced in humans Speciation - ANSWER-Splitting event that created 2 or m...

What is micro-evolution? - Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" What is macro-evolution? - Major changes in the history of life, origin of new species, generates biological diversity "big changes" What is a species? - a group of populations whose members have the potential to interbreed with one another in nature to produce fertile offspring What is allopatric speciation?...

"Salting out" - certain ions become too concentrated in soils and draw water out of roots by osmosis, causing plant death 2 types of lateral meristems: - Cork cambium vascular cambium 2 ways to increase allele diversity/allele frequency distribution: - 1.) gene flow 2.) mutation 3 Chordate Subphyla - Urochordata, Cephalochordata, and Vertebrata 3 criteria for designating species: Boys Make Pasta - biological, morphological, phylogenetic 4 key characteristics of chordates - 1.) notochor...

WGU C190 Biology Exam Questions and Answers (Graded A) WGU C190 Biology Exam Questions and Answers (Graded A) WGU C190 Biology Exam Questions and Answers (Graded A) WGU C190 Biology Exam Questions and Answers (Graded A) WGU C190 Biology Exam Questions and Answers (Graded A) WGU C190 Biology Exam Questions and Answers (Graded A) Coevolution Event - ANSWER - The process by which two or more species evolve in tandem by exerting selection pressures on each other Speciation Event - ANSWER - A li...

micro-evolution - Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" macro-evolution - Major changes in the history of life, origin of new species, generates biological diversity "big changes" species - -a group of populations whose members can interbreed -produce fertile offspring allopatric speciation - -Species evolve in geographic isolation, usually bc of a geographic barrier -...

What is micro-evolution? Changes in allele frequencies within populations, often associated with adaptation, can be measured from one generation to the next "small changes" What is macro-evolution? Major changes in the history of life, origin of new species, generates biological diversity "big changes" What is a species? a group of populations whose members have the potential to interbreed with one another in nature to produce fertile offspring What is allopatric speciation? Speci...