PPT-Evolution – the genetic change in a species over time

Recent Evolution in Humans Evolution is very much still happening today and its happening to us Right here right now Our genes constantly change over time thanks to the power of selection. (Processes + Patterns of Evolution). Evolutionary Change via Selection . . Types of selective pressures may result from: . i.e. climate conditions, food availability, predators, and choice of mate etc.. (Dunbar . Ch. 1). Psychologists studied Rats…. And made inferences about humans. Biologists studied non-humans…. And didn’t. The matter of evolution and common ancestry was ignored or avoided. By C. Kohn. Agricultural Sciences. Waterford, WI. 1. Species Change. The . traits of a species are primarily determined by the types of proteins made in its cells. . All proteins are made from amino acids, and different arrangements of amino acids result in different proteins. . process. Written in the genetic code of species alive today. Story of life on earth is the story of the molecule of life---DNA---and the various ways in which it manifests itself, in the form of living species in order to survive. The molecules essential to life today did not exist at the time Earth was formed.. The molecules essential to life today could not have been carried to the primordial Earth by a comet or meteorite.. The molecules essential to life today could have formed under early Earth conditions.. Chapter Overview Questions. How do scientists account for the development of life on earth?. What is biological evolution by natural selection, and how can it account for the current diversity of organisms on the earth?. History of Evolution. The evolution of life is linked to the physical and chemical evolution of the earth.. Life on earth evolved in two phases over the past 4.7 -4.8 billion years. Chemical evolution (1 billion years) of the organic molecules and systems of chemical reactions needed to form the first proto-cells.. 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.. Patterns of inheritance. Starter. Natural selection recap. Can you remember natural selection from GCSE and AS?. Outline the process of natural selection. Natural selection. Within any species there is variation, due to different alleles. Chapter 22 – Descent with Modification. The Era of Evolutionary Biology. On November 24, 1859, . Charles Darwin. . published his hypothesis in . On the Origin of Species by Means of Natural Selection. . Natural Selection. , Genetic . Variation. Adaptation and . Competitive Advantage. Skiados. 2017-2018. Why do giraffes have such long necks?. From Life Science textbook (. pg. 533). A giraffe’s long neck is . Evolution 9/11. Obj. TSW learn form mistakes made on the quiz, and take notes about evolution after the Environmental Science Current Events. P. 34NB. Make a food chain for the following organisms showing the energy arrows and the . Origins of Life on Earth. 4.7-4.8 Billion Year History. Evidence from chemical analysis and measurements of radioactive elements in primitive rocks and fossils. . Life developed over two main phases:. Adaptation. Adaptations are inherited traits that increase a group’s chance of . survival & reproduction. This type of finch has a thick beak .  adaptation for cracking open seeds. Variation.