Sympatric speciation Study guides, Class notes & Summaries

he world, in the US - 5500, 965 Number of threatened/endangered mammal species - 1000 What separates mammals from birds, reptiles, and amphibians - Mammals have hair, mammary glands, and three ear bones. What distinguishes birds from mammals, reptiles, and amphibians - Feathers Number of species of birds in the world, in North America, in the US - 9900, 2000, 925 Number of threatened/endangered bird species - over 1000 Number of reptile species in the world - 8200 Number of reptile speci...

AP Biology Exam Questions and Answers Graded A+ What are the 2 theories of evolution? Explain each Gradualism- geologic changes result from slow, gradual, continuous process Punctuated Equilibrium- Long period of stasis punctuated by short bursts of significant change. What was Lamarck's theory and why was it wrong? Lamarck = Inheritance of Acquired characteristics- traits acquired during lifetime could be passed on What is natural selection Comptetition for limited resources re...

BIO 202 Exam 1 Questions With 100% Correct Answers Updated 2024/2025 (Graded A+) When was earth formed? - correct answer 4.55 billion years ago When did life on earth first appear? - correct answer 3.5 billion years ago What are the evolutionary mechanisms? - correct answer *Nonrandom mating *Migration *Genetic drift *Natural selection When does allopatric speciation occur? - correct answer when members of the same species become geographically separated When does sympatric speciation oc...

What is microevolution? - The change in allele frequencies that occurs over time within a population. What is macroevolution? - Major evolutionary changes over time, the origin of new types of organisms from previously existing, but different, ancestral types. What is a species? - A group of populations whose members possess similar anatomical characteristics and have the ability to interbreed. What is allopatric speciation? - The formation of a new species in populations that are geographi...

Convergent vs Divergent Evolution - ANSWER -Divergent: one broad class but because of different features they diverge -Convergent: similar features between 2 different classes Punctuated Equilibrium vs Gradualism - ANSWER -Punctuated: concrete & defined phenotypes -Gradualism: phenotypes gradually evolve Speciation - ANSWER Formation of new species 1) Allopatric: separated by geographical barrier (mountain, ocean, river) -Barrier divides species 1 and species 2 2) Parapatric...

Environmental Science Exam 1 Practice Test Questions & Answers 2023/2024 When a new species evolves as a result of geographic isolation it is referred to as A. sympatric speciation B. Natural Speciation C. Allopatric Speciation D. Resource partitioning - ANSWER-C Gifford Pinchot believed that resources should be used for the greatest good for the greatest number for the longest time and thus he practiced A. Biocentric preservation B. Utilitarian conservation C.Holistic preservatio...

What is microevolution? - ️️The change in allele frequencies that occurs over time within a population. What is macroevolution? - ️️Major evolutionary changes over time, the origin of new types of organisms from previously existing, but different, ancestral types. What is a species? - ️️A group of populations whose members possess similar anatomical characteristics and have the ability to interbreed. What is allopatric speciation? - ️️The formation of a new species in po...

Chapter 03 - Natural Selection, Speciation, and Extinction Multiple Choice Questions Chapter 03 Natural Selection, Speciation, and Extinction 1. What is not a recognized pattern of natural selection? A. Directional B. Stabilizing C. Evolutionary D. Balancing E. Disruptive Bloom's Level: 1. Remember Learning Outcome: 03.01 Topic: Evolutionary Ecology 2. The change in color of peppered moths in polluted areas is an example of which pattern of natural selection? A. Directional B. Stabili...

Macroevolution changes in a population over very long periods of time. Speciation the splitting of one species into two or more new species Biological Species Concept offers testable way to define a species that does not depend on appearance: The members of a species interbreed and have a shared gene pool, & each species is reproductively isolated from every other species. Gene flow occurs between the populations of a species, but not between pops of diff species. Biolo...

Bio 311D Exam 2 Dr English To have no change in allele frequencies, you'll need... (H-W assumptions) - 1. No mutations 2. Random mating 3. no heritable advantages 4. enormous population 5. No incoming/outgoing individuals Evolution - change is proportion of alleles in a population Descent with modification - 1. organisms look different today 2. organisms look different than their predecessors 3. that change in appearance is -heritable -adaptive Natural selection means - ...