Microevolution is defined as all the answers are correct evolutionary changes on a grand scale new forms replacing old forms changes in gene frequencies that result in subtle changes in a population
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- NATURAL SELECTION A. 1 Q # 1. Describe what is happening in figures 1-3. Is the population of mice different in figure 3 than in figure 1? Explain why. 食 Adapted from the University of California, Los Angeles Life Sciences 1 Demonstration Manual Copyright 2008 by Jennifer Doherty and Dr. Ingrid Waldron, Department of Biology, University of Pennsylvania¹ CAS ced by by each complete de So sfir QUA 2 why this 49 M ness is que which Qu 3 yould biologists ha $02. cm/sec. and produce offspring who C Fo C Living things that are well adapted to their environment survive and reproduce. Those that are not well adapted don't survive and reproduce. An adaptation is any characteristic that increases fitness, which is defined as the ability to survive and reproduce. 2. What characteristic of the mice is an adaptation that increased their fitness? ¹ Teachers are encouraged to copy this student handout for classroom use. A Word file (which can be used to prepare a modified version if desired), Teacher…x S Notebook2020- Evolution starts S Evo. Evidence & Natural Sel. RET X S Review Study Evolution powerpc X y.kleinisd.net/assignment/4764329950/assessment LOWLAND A genetic change causes a few of the pitcher plant seedlings to grow much faster than other seedlings resulting in taller pitcher shaped leaves. Genetic diversity will likely increase in this population. This increase is due to -- (7F) O a . Gene flow b. Other evolutionary mechanisms Genetic drift Mutation Question 7In the mountain environment (mostly grey) what would someone expect to happen to the the mouse population in the simulation? Group of answer choices 1. the population would stay at the same frequencies because mutations aren't happening 2.the population would have 2 different species: brown and grey mice 3.the population would go down to only a few mice and they would all be brown 4.the population would have a higher % of grey mice than brown mice by the end
- A reasonable definition for a species is: O A distinct kind of animal. O A group of living things with functionally similar traits, for example, all creatures that can fly. O A group of living things with taxonomically similar traits. O A group of taxonomically similar living things in which all healthy members can interbreed and produce fertile offspring. QUESTION 8 If microevolution is any change in the gene pool of a breeding population, then macroevolution is: O A change in the genetic makeup of group that eventually results in the development of a new species. O The mass exctinction of old species to make way for new. O Changes in the physical environment at large. O When microevolution happens on a large scale. * QUESTION 9 What is the primary cause of speciation? O Extinction. O Overpopulation. O Environmental change. O When a breeding population becomes reproductively isolated from its ancestral population, for a long enough time, in a different enough environment, that it…suppression behavioral natural selection advantage desirable Question 1 Natural selection occurs over a very period of time. Question 2 is the process of small genetic in organisms leading to the gradual development of a species. Question 3 Inherited traits that provide an to survival also make that organism more likely to reproduce, thereby passing on the trait. acer mO Ability to see UV light Grades lembers nferences In the 1890s, hunting reduced the northern elephant seal population to only 20 individuals. Due to conservation efforts, their population size today is above 30,000. How would the genetic diversity of the northern elephant seal population compare to the genetic diversity of the southern elephant seal population, which was not heavily hunted? * g Online sela on Periods 1 and 2 riods MP1, Highschool The northern elephant seal would have much less genetic varlation than the southern elephent seal. hool MP3, The southern elephant sea would have much less genetic variation than the northern elephant seal. AP4 O The two populations would have similar genetic variation Thu Fri The southern elephant seal would have stable genetic variation because it is in Hardy- Weinberg equilibrium. You are studying two variations of banana slugs. They have similar coloration and ATthnh thare.nhveieallu obl lein thecomeheh US A 9:0
- L A Moving to another question will save this response. Question 6 This is not a mechanisms for microevolution: Mutation Gene flow Having a small population size that facilitates genetic drift Natural selection Sexual reproduction Moving to another question will save this response.Fixity of Species refers to… Group of answer choices A-the theory that species exist at a fixed location along a physiological continuum B-the fact that species are defined by fixed adaptations to their direct environment C-the theory presented by Thomas Malthus that population densities of any given species are most affected by mortality and fertility rates D-the pre-darwinian notion that species, once created, can never change E-the late 19th century concept that because mendelian traits are fixed they are evidence that variation within and between species are designed by God specifically for those speciesEcalogical seleation Sexual selection What is ecological selection? How is it different from sexual selention torsurviva - Selection by the opposite sex - pormpetitive ad vantage Competition within males females predator avoidanoe selection? What kinds of traits result from ecological selection? Erirae Constraints on adaptive pertecton (optmali Why doesn't natural selection produce optimally adapted organisms? Oren ldaa NOT cop Adigsdon re om civep eb he numet n ognawihrntruclure and e . r e e Tw u n Ecological selection oeed .ha o hore cs Scanned vwith CamScanner
- mbers aferences A population that is in Hardy-Weinberg equilibrium does not experience any migration. How does this relate to evolution? * QOnline When individuals enter a population, adaptive radiation can occur. wsela Speciation only occurs when populations are completely isolated. ation Mogy Periods 1 and 2 When individuals enter or leave a population, the gene frequencies change. ng periods chool MP1, Highschool Highschool MP3, uchool MP4 O Migration interferes with nonrandom mating. Cion ting days Deer mice are usually found in the woods and are dark brown in color. The deer Tue Wed Thu Fri mice that live in the Sand Hills of Nebraska, however, have evolved a lighter coloring, the result of a change in one gene. How does this information illustrate natural selection? * Speciation occurs when groups are geographically isolated. 9:02 USrn.genetics.utah.edu/content/evolution/barriers/ 3. Reproductive isolation reduces GENE FLOW between populations This means that each subpopulation evolves separately and can result in a new species. Isolating mechanisms fall into the following categories. For each category, identify which example(s) from the chart above matches it. Reproductive isolation: physiology prevents mating or producing fertile offspring. Ex. shape or reproductive organs not compatible Temporal isolation - timing isolation, individuals mate at different times of year. Example. frogs that mate in may versus those that mate in July. Behavioral isol -behaviors prevent mating. Ex. birds recognize mates by songs or dance Still confused? Here is more information on reproductive isolation: https://bio.libretexts.org/Bookshelves/Introductory and General Biology/Book%3A General Biology (Bo undless/18%3A Evolution and the Origin of Species/18.2%3A Formation of New Species/18.2B%3 A Reproductive IsolationWhat are some notes or take aways about this model? Model 1 – PopGen Fish Pond This model is an agent-based population genetics simulation. The program contains the tools to conduct virtual experiments violating all the assumptions of Hardy-Weinberg theory (small population, selection, mutation, migration, and non-random mating).