Describe one evolutionary meme ( why it is a compelling meme ,it’s generation time ,it’s survival adaptations ,modes of reproduction/transmission(i.e horizontal or vertical ?)visual or auditory?
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- Wolbachia is a genus of bacteria that infect cells of invertebrates. Surveys have found that up to a fifth of insect species have at least some individuals infected with Wolbachia. Pathogen or parasite? This endosymbiont (a symbiont that lives inside its host) bacteria can have many effects on its host, including killing offspring and changing the sex of offspring. Ary Hoffmann from the University of Melbourne in Australia, Michael Turelli from the University of California at Davis, and their associates have been studying Wolbachia infections in populations of Drosophila simulans from California. From the initial infection around 1980, Wolbachia infection spread northward across the state during the 1980s and 1990s. The most striking manifestation of infection in this fly species is cytoplasmic incompatibility: offspring produced in crosses where males are infected and the females are uninfected tend to die early in development. In crosses between infected males and infected females,…An organism has the following characteristics: • This organism has two multicellular forms, one haploid and one diploid • This organism has vascular tissue • This organism forms spores • This organism does photosynthesis This set of characteristics is consistent with: A fungus A moss An animal A fern A flowering plantReproduction is important because _____. A) it pass on genes adapted genes to future generation ensuring survival B) it maximizes individuals survival C) it is the key for individuals success D) life is nothing without sex
- Multicellularity has evolved multiple times in different lineages on Earth. What is one major advantage of multicellularity over unicellularity? Multicellular organisms can move faster than unicellular organisms Multicellularity allows for specialization of cells into different tissues and organs Multicellular organisms have higher fitness than unicellular organisms. Multicellularity allows organisms to reproduce more rapidly. Only multicellular organisms can reproduce sexually.place the evolutionary steps that led to complex multicellularity in the order in which they thought to have occurred. a) The ability of cells to stick to each other b) Differential gene expression in cells c) The ability to communicate between cells d) The ability to move molecules by bulk flowWhen describing this experiment to your friends, they point out that rotifers are multicellular predators and thus cannot have been responsible for the earliest transition from single cell to multicellularity. Based on what you have learned in this lab and in the paper by Herron et al. 2019, what would be an informed response to this comment include? Select all that apply. Question 3 options: It is irrelevant that rotifers are multicellular in our study as some of the predators of small unicellular organisms are themselves unicellular, and predation, whether by a unicellular or multicellular organism, was all that was needed. Multicellularity evolved many times. While multicellular predators cannot have been responsible for the earliest transition from unicellular to multicellularity, they may have played a role in some of the later transitions which occurred after the evolution of animals. Using a multicellular predator is…
- Volvox carteri, an volvocine alga, has approximately 2000 somatic cells and only 16 reproductive or germ line cells. The observation that multicellular individuals, like Volvox, have a much smaller subset of germ line cells compared to somatic cells appears to be general rule. Which of the following is the best evolutionary explanation for why this is the case? A) Organisms can biologically only contain a small number of germ line cells as they are always larger than somatic cells. B) Multicellular individuals with a germ line vs. somatic cell line differentiation only evolved a single time, thus all members of this lineage share the same scheme of more soma cells with a much smaller subset of germ line cells. C) Having a smaller subset of reproductive cells helps reduce the likelihood of cheating from evolving, which in turns prevents the collapse of the multicellular individual system. D) None of the above.Consider the figure attached. A student in a course on intelligent design theory claims that the graph in part (a) shows that losing the ability to respire actually is adaptive for yeast cells living in small populations. Please read the incomplete sentence that appears immediately below, assess as possible completions the lowercase-Roman-numeral-labelled statements that follow, and click each uppercase-letter-labelled response that is presented below and completes accurately the sentence. An astute student in an evolution course would respond that i. the graph in part (a) shows that selection among mitochondria within yeast cells can lead to fixation for traits that decrease mean fitness for that yeast population. ii. the student in the course on intelligent design is wrong; the yeast cells in the small population group retained completely the ability to respire, as they otherwise would have been unable to harvest energy. iii. a property (e.g., inability to respire) that is…1) The Miller-Urey experiment in 1953 proved that Group of answer choices multicellular organisms can evolve from unicellular ones living cells could arise from non-living substances organic molecules important to living things could form from a "hot soup" of simple substances conditions on early Earth were not as inhospitable as biologists of the time generally believed a source of energy was not required in order for life to develop on Earth B) Which of the following statements about protists is false? Group of answer choices Some protists are mixotrophic Certain protists share a common ancestor with land plants Some protists are photosynthetic prokaryotes which are similar to the ancestral chloroplast Protists are a polyphyletic group of organisms that often bear little resemblance to each other Although most protists are unicellular, some protists are multicellular as well
- What's In Let us review what you have learned from the previous module. Answer the activity below. ACTIVITY 1. Match Me! Directions: Match Column A with the correct answers in Column B by writing the number of your answers in the Answer Grid. If all your answers are correct, the sum when answers are added horizontally, vertically, or diagonally will give you a magic number. Column A Column B a. A process in which new species form b. Authored the Theory of Evolution by Natural Selection 1. Thomas Malthus 2. Hybrid sterility 3. Pre-mating isolating mechanism c. It occurs when a hybrid develops, matures but fails to reproduce d. States population limits resources e. Species will different mating seasons f. Sought pieces of evidence for the idea of uniformitarianism that increasing human 4. Jean Baptiste Lamarck due 5. Temporal isolation not mate to 6. Speciation 1What's In Let us review what you have learned from the previous module. Answer the activity below. ACTIVITY 1. Match Me! Directions: Match Column A with the correct answers in Column B by writing the number of your answers in the Answer Grid. If all your answers are correct, the sum when answers are added horizontally, vertically, or diagonally will give you a magic number. Column A Column B a. A process in which new species form b. Authored the Theory of Evolution by Natural Selection 1. Thomas Malthus 2. Hybrid sterility c. It occurs when a hybrid develops, matures but fails to reproduce increasing 3. Pre-mating isolating mechanism d. States that human 4. Jean Baptiste Lamarck population limits resources e. Species will different mating seasons f. Sought pieces of evidence for the idea of uniformitarianism due to 5. Temporal isolation not mate 6. SpeciationAn organism has the following characteristics: • This organism has two multicellular forms, one haploid and one diploid • This organism does not have any vascular tissue The cells from this organism generally cannot move unless they are carried by wind or water This set of characteristics is consistent with: An animal A fern A moss A tree that produces flowers