The Extinction Vortex
... • Usually the color distribution in your new, very small population, is very different than it was in the whole population, & some colors are missing • This phenomenon of random change in gene frequency & loss of diversity is called “random genetic drift” ...
... • Usually the color distribution in your new, very small population, is very different than it was in the whole population, & some colors are missing • This phenomenon of random change in gene frequency & loss of diversity is called “random genetic drift” ...
mass-extinctions-1
... • Only the organisms best suited to the new conditions will survive and reproduce • Evidence of mass extinctions comes in the form of fossil records ...
... • Only the organisms best suited to the new conditions will survive and reproduce • Evidence of mass extinctions comes in the form of fossil records ...
Speciation Notes
... Reproductive isolation without geographic barrier How o Plants – polyploidy (multiple sets of chromosomes) o Animals – group fixed on resources not used by parent population ...
... Reproductive isolation without geographic barrier How o Plants – polyploidy (multiple sets of chromosomes) o Animals – group fixed on resources not used by parent population ...
What is the difference between microevolution
... 3. List the factors that prevent species from interbreeding and producing fertile offspring. Prezygotic barriers: habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation Post zygotic barriers : reduced hybrid viability, reduced hybrid fertility, hybrid br ...
... 3. List the factors that prevent species from interbreeding and producing fertile offspring. Prezygotic barriers: habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation Post zygotic barriers : reduced hybrid viability, reduced hybrid fertility, hybrid br ...
S5O1 Pretest - SunsetRidgeMSBiology
... B. two groups in a species can no longer interbreed C. populations move away from one another D. species begin to pass on acquired traits and change behavior ...
... B. two groups in a species can no longer interbreed C. populations move away from one another D. species begin to pass on acquired traits and change behavior ...
CP Chapter 5 - Madeira City Schools
... 9. What is the difference between a generalist and a specialist? List some characteristics of each. ...
... 9. What is the difference between a generalist and a specialist? List some characteristics of each. ...
Evidence for Evolution
... Molecular homology includes a variety of similarities: All organisms share the same genetic code (DNA/RNA triplets/codon The closer related a species, the higher the percentage of identical DNA • Chimp and human DNA is 98% identical • Bird and Human DNA is only 60% identical • Plant and Human DN ...
... Molecular homology includes a variety of similarities: All organisms share the same genetic code (DNA/RNA triplets/codon The closer related a species, the higher the percentage of identical DNA • Chimp and human DNA is 98% identical • Bird and Human DNA is only 60% identical • Plant and Human DN ...
Reproduction - Science
... Species that reproduce sexually have an advantage over those that reproduce asexually when external conditions change. This is how organisms have become adapted to their environment over time. – Describe the difference between sexual and asexual reproduction in terms of the genetic makeup of the off ...
... Species that reproduce sexually have an advantage over those that reproduce asexually when external conditions change. This is how organisms have become adapted to their environment over time. – Describe the difference between sexual and asexual reproduction in terms of the genetic makeup of the off ...
VOCAB- Evolution
... ADAPTIVE RADIATION (DIVERGENT EVOLUTION) – process by which a single species or small group of species evolves into several different forms that live in different ways; rapid growth in the diversity of a group of organisms. COEVOLUTION- process by which two species evolve in response to changes in e ...
... ADAPTIVE RADIATION (DIVERGENT EVOLUTION) – process by which a single species or small group of species evolves into several different forms that live in different ways; rapid growth in the diversity of a group of organisms. COEVOLUTION- process by which two species evolve in response to changes in e ...
7.1 Adaptation and Variation - Ms. Pasic
... • Batesian mimicry: unharmful species mimics a harmful one • Mullerian mimicry: 2 harmful species mimic eachother ...
... • Batesian mimicry: unharmful species mimics a harmful one • Mullerian mimicry: 2 harmful species mimic eachother ...
SBI3U Evolution Name: Problem Set: Evolution Answer the following
... eubacteria plasma membranes. Mitochondria and chloroplasts also have their own DNA, which appears to be remnants of circular eubacterial chromosomes. The DNA also contains coding sequences for various proteins and RNA, which resemble bacterial genes. Mitochondria and chloroplasts replicate their own ...
... eubacteria plasma membranes. Mitochondria and chloroplasts also have their own DNA, which appears to be remnants of circular eubacterial chromosomes. The DNA also contains coding sequences for various proteins and RNA, which resemble bacterial genes. Mitochondria and chloroplasts replicate their own ...
Outcomes of Natural Selection (Chapter 19)
... flies from a single population and divided them into separate populations living in different cages to simulate geographic isolation. Half of the populations lived on maltose-based food, and the other populations lived on starch-based foods. After many generations, the flies were tested to see which ...
... flies from a single population and divided them into separate populations living in different cages to simulate geographic isolation. Half of the populations lived on maltose-based food, and the other populations lived on starch-based foods. After many generations, the flies were tested to see which ...
Chapter 7 Powerpoint
... • Habitat: where a species lives • Ecological Niche: a species profession • The reason more species do not die out from competition is that they have developed a niche, and thus avoid competition ...
... • Habitat: where a species lives • Ecological Niche: a species profession • The reason more species do not die out from competition is that they have developed a niche, and thus avoid competition ...
Species distribution
Species distribution is the manner in which a biological taxon is spatially arranged. Species distribution is not to be confused with dispersal, which is the movement of individuals away from their area of origin or from centers of high population density. A similar concept is the species range. A species range is often represented with a species range map. Biogeographers try to understand the factors determining a species' distribution. The pattern of distribution is not permanent for each species. Distribution patterns can change seasonally, in response to the availability of resources, and also depending on the scale at which they are viewed. Dispersion usually takes place at the time of reproduction. Populations within a species are translocated through many methods, including dispersal by people, wind, water and animals. Humans are one of the largest distributors due to the current trends in globalization and the expanse of the transportation industry. For example, large tankers often fill their ballasts with water at one port and empty them in another, causing a wider distribution of aquatic species.Biogeography is the study of the distribution of biodiversity over space and time. It is very useful in understanding species distribution through factors such as speciation, extinction, continental drift, glaciation, variation of sea levels, river capture and available resources. This branch of study not only gives a description of the species distribution, but also a geographical explanation for the distribution of particular species. The traditional biogeographic regions were first modeled by Alfred Wallace in The Geographical Distribution of Animals (1876). These were based on the work of Sclater's terrestrial biogeographic regions. Wallace's system was based on both birds and vertebrates, including non-flying mammals, which better reflect the natural divisions of the Earth due to their limited dispersal abilities.