PPT-Populations change over time

There are a lot of factors that affect the populations within a biological community Some have to do with organisms themselves Others relate to the habitat Any factor or conditio n that limits the growth of a population in an ecosystem is called a limiting factor. An EGLSF funded Just a Ball Game? anti-homophobia in football exhibition project. Some background to the . project: . Founding director of Just A Ball Game? Lindsay England says: “We hope to make use of the wonderful and dynamic exhibition as part of our on-going campaign work to raise awareness around homophobia and help mainstream sport to be more inclusive of a number of diversity issues and help create a safe space for both LGBT people and those who are perceived to be ‘LGBT’ to achieve their potential. . Chapter Overview Questions. What are the major characteristics of populations?. How do populations respond to changes in environmental conditions?. How do species differ in their reproductive patterns?. 8.7. Starter. What is speciation?. The evolution of new species from existing species.. Learning Objectives. Define speciation. Describe geographical isolation. Explain how geographical isolation can lead to the formation of new species. Chapter 42. Chapter 42 Populations. Key Concepts. 42.1 Populations Are Patchy in Space and Dynamic over Time. 42.2 Births Increase and Deaths Decrease Population Size. 42.3 Life Histories Determine Population Growth . Natural selection acts on phenotypic variations in populations. Enduring Understanding 1A. Change in genetic makeup of a population over time is evolution. Environments change and act as selective mechanisms on populations.. Your . Fish Populations . Healthy. Healthy Fish Populations. Big Fish. Eat lots of high energy food and spend little energy getting it.. Many Fish. Eggs survive. Young find food and shelter. Don’t get eaten. There is overwhelming evidence for the evolution of life on Earth. . Evolution in summary. Evolution occurs when heritable characteristics of a species change. . Evolution at its most fundamental level simply describes a . A mechanism for change in populations.. Any change in the . inherited . traits within a population across generations. Individuals better adapted to their environment tend to survive and . produce more offspring. PrEP and Key populations: WHO guidelines & recommendations www.who.int Michelle Rodolph, WHO, HIV Department, Switzerland 24 July 2018 . Evolution of WHO PrEP recommendations (Part I) PrEP for SDC, MSM and Trans people Early atmosphere, evidence, natural selection and disease agents influence natural selection. . Introduction . Evolution “ simple” definition: change over time. Evolution helps us to understand the history of life.. 1. OVERVIEW. 2. Natural selection . acts . on . individuals. , but . only . populations. . evolve. .. Genetic variations in populations contribute to evolution.. Microevolution . is d. efined as a change in . Change in . allele frequencies . in a population over generations. Microevolution. Speciation. = origin of species. Microevolution. : changes . in allele frequencies within . a single gene pool. Macroevolution. modiolus. . biogenic reefs to climate change:. A population-based approach for effective marine management . M. modiolus. reefs are typically characterized by . high species . diversity. ;. Habitat modification . Evolution & Natural Selection Vocabulary. Types of Selection. Artificial Selection. Selection by humans for breeding of useful traits from the natural variation among different organisms, Ex. Dog Breeding.