PPT-Evolution: A change in a population over time

Causes of Evolution Natural Selection Migration Mutation What is Natural Selection Survival of the fittest Occurs through INHERITED adaptations What is migration Movement of animals from one area to another . 20 1027200 1048830 1054860 1081860 1126920 1137390 1180200 1192470 1229340 1282710 O7 826440 864840 882600 896730 922290 947580 976770 1005900 1035120 1126920 1204380 O6 612540 672960 717120 717120 719850 750720 754770 754770 797670 873510 918030 O5 Test on Friday . 4/07. TEST ON TUES. 3/30. Variation in Species Lab. All species have variation. What are some variations you noticed in the size of:. Peas. Grasshopper femurs. Eye width. What are some advantages and disadvantages to these variations?. 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. Subject:. Biology. Date:. «date». 1. Which of the following could cause changes in populations of organisms over time?. A. The evironment. B. Geographic separation. C. Human choices. D. All of these. 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.. Recent Evolution in Humans. Evolution is very much still happening today — and it's happening to us.. Right here, right now.. Our genes constantly change over time thanks to the power of selection.. Module 14 . The . Biodiversity of Earth. After reading this module you should be able to. understand . how we estimate the number of species living on Earth.. quantify . biodiversity.. describe . patterns of relatedness among species using a . 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. Population genomics and comparative genomics. molecular evolution . what happens at the level of DNA . when organisms change and evolve. Daniel Jeffares. Population genomics and comparative genomics. The . processes. that have transformed life on earth from it’s . earliest forms. to the vast . diversity. that characterizes it today.. A . change. in the . genes!!!!!!!!. Old Theories of Evolution. 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. Evolution of one ancestral species to new distinct species. Happens over a long period of time (evidence relies on fossils). Relies on Microevolution. Changes in the gene pool of one species that gives rise to variation in one species. POPULATION change . over time. . Natural Selection. Definition: The process whereby organisms . better adapted to their environment . tend to survive and produce more offspring. . Adaptation. A change or process of change by which an organism or species becomes . . The process by which organism change over time. Based on science, not opinion.. Darwin. :. Evolution is descent with modification. Evolution. :. changes through time. Species accumulate difference.