Yum! Green beetles! Our favorite! -generations later. Natural Selection Analyze: In your own words, describe why the orange beetles survived in relationship to what you have learned about natural selection Green beetles have been selected against, and brown beetles have flourished.
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- Select all that apply. Beetles from two geographically isolated populations are captured and brought to the lab. When an adult male from one population and an adult female from the other population are placed together, they mate, and the female lay eggs a couple of days later. The eggs hatch, the beetles develop into adults but are sterile. Which of the following are true? This is an example of post-zygotic reproductive isolation. O Sexual selection is likely responsible. O This is an example of pre-zygotic reproductive isolation. O Dobzhansky-Muller genetic incompatibility is likely responsible. Question 3 Choose all that apply. Which of the following are true of adaptive radiations? OAdaptive radiations involve relatively rapid speciation. The evolution of the Hawaiian silverswords is an example of an adaptive radiation. OAdaptive radiations can occur when an ancestral species colonizes a new arca and adapts to multiple open niches. Question 4 What are the three major steps of…Hello, I need help answering number 5 questions using the phylogeny below pls & thank you! 5.a) In the 1990s, when only mitochondrial DNA sequencing was available, geneticists claimed that there was no hybridization between humans (Homo sapiens) and Neanderthals (Homo neanderthalensis). Does the phylogeny shown above support the claim humans did not hybridize with Neanderthals in the past? How can you tell? b) Once nuclear DNA sequencing became fast and able to handle sequencing ancient DNA, living humans were found to have some Neanderthal genes. Is this finding clear evidence that some early modern humans did indeed hybridize with Neanderthals? Why? c) Did female H. sapiens hybridize with Neanderthal males to produce fertile offspring that then back-crossed with modern humans? What does the graph say about this? d) Did male H. sapiens hybridize with Neanderthal females that then back-crossed with modern humans? What does the graph say about this? Picture reference:…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 species
- 1. Is there a correlation between survival, reproduction and environment color? Explain. 2. Are there any other factors besides color important in determining survival in the simulation? 3. Why did we set the rate of reproduction at 2/survivor? What would happen if one color always had more offspring than other colors? 4. Suppose that a mutation occurs and a white, “albino” bead is born. How well would it survive in your environment? Please answer all questions pleaseWhat data would suggest that a species evolutionary history includes sexual selection as a mechanism that helped shape the species? If males and females are significantly different from each other (sexual dimporphism) If males and females form different social groups (i.e. herds are formed from either males or females but not both) If some males reproduce with multiple females while other males do not reproduce If males engage in "risky" behaviorGive a Darwinian explanation of how cheetahs evolved to become faster. Your explanation is how natural selection works using Cheetahs as an example. Be sure to include and explain the ideas of differential reproductive success and descent with modification. (You do not need to mention the formation of new species.)
- Give a Darwinian explanation of how cheetahs evolved to become faster. Your explanation is how natural selection works using Cheetahs as an example. Be sure to include andexplain the ideas of differential reproductive success and descent with modification. (You do not need to mention the formation of new species.)What is variation? Give its importance. What are the possible causes of variations? Give specific examples. How would you know or identify if the cause of variation is genetic, environmental, or both? Classify these variations as to "species characteristics" or "individual characteristics". Thorns in the stalk of the rose flower Body size of ants Color of apple skin Color mosaic in San Francisco leaf Number of body segments in wormThe "balance" theory by Dobzhansky -is a theory based on the idea that genetic diversity in a population is maintained by heterozygote superiority. -is a theory that predicts a low level of genetic diversity in a given population. -was proposed in contrast to the so-called "classical" theory which hypothesized that individuals in a given diploid population should mostly be carrying neutral mutations in their genomes. -has been confirmed by numerous modern-day population genetic surveys, demonstrating the important of neutral mutations and genetic drift. -All of the above
- Remember that understanding is explanations more than facts. Definitions of phenotype, genotype, allele, gene, microevolution, macroevolution Know that in humans, most of the genetic variation is observed within populations, and know why that is. Know the 4 processes of evolution (3 neutral + natural selection) Know that evolution isn't progressive and doesn't necessarily lead to more complexity Know that evolution can lead to traits that decrease survival (ex: sexual selection) Know that quantitative traits are generally influenced by (i) many genes, each having a small effect on the trait value; and (ii) the environment What is F1 like when you cross 2 homozygotic lines of peas of different colors? What is F2 like when you cross F1 individuals (remember what 9:3:3:1 is about) Know what genetic dominance is about Definitions of chromosome, nucleus, mitosis, meiosis, crossing over How many chromosomes in humans? How many pairs of chromosomes? Know and apply Hardy-Weinberg's equation…Which evolutionary mechanisms (natural selection, mutation, genetic drift, or gene flow) would you need to understand to predict the success of genetically modified mosquitoes to: 1. Drive the mosquito population to extinction? 2. Replace the mosquito population with genetically modified mosquitoes that can not transmit malaria?. The Process of Evolution by Natural Selection – Be able to explain the process of evolution by natural selection as it applies to a specific living thing using the outline below: Natural variations caused by random mutations (adaptations) in DNA exist within populations. Those with helpful adaptations survive an environmental change (maybe a predator.) The survivors breed, passing on the inherited mutation (adaptation) to offspring. The resulting population has more of the successful inherited mutation (adaptation) than the original population. Phylogenetic Trees Infer evolutionary relationships of living things by interpreting phylogenetic trees. Know the divisions of hierarchical classification. (DKPCOFGS) c. Differentiate between homologous and analogous (caused by convergent evolution) structures