Consider a population of sticklebacks in a large lake undergoing pollution remediation. The remediation is effective in improving water quality and clarity. This could potentially cause the number of bony plates on sticklebacks to evolve. Which of the following answers best identifies the conditions under which NO natural selection would occur?
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- n of Species: Lizards in an Evolutionary Tree tion: Lizards in an evolutionary tree. Laylinn molinar Per 3_ In what environment is long leg length an advantage for a lizard? e) Why have anoles evolved different toe pads? 3) Does evolution happen quickly or slowly? Does it happen at the leve population? 4) Why is a change in dewlap considered an important step in the forma 5) What is the difference between microevolution and macroevolution?All birds living today are descended from a group of dinosaurs called theropods. Theropods first appeared in the fossil record around 200 million years ago. However, fos- sils of taxa similar to modern birds can be found in the fossil record from around 66 million years ago. The table below provides information about certain traits in theropods and modern birds. An X indicates the presence of a trait. Theropods A Trait B с Bipedal D Hollow Bones Feathers Long Boney Tail Jaws with Sharp Teeth Fused Clavicle X Reversed First Toe A table that shows the comparison of traits in theropods and modern birds. X X X Modern Birds X X Each of the answer choices below describes a specific fossil. Which fossil provides the strongest evidence for the discovery of a transitional species that existed in the period between theropods and modern birds? X X X The fossil of a bipedal organism with hollow bones was found in a 100-million-year-old rock layer. The fossil of an organism with a reversed first…The presence of tiny hairs, called setae, on the toe pads of some geckos is associated with the ability to adhere to smooth surfaces. This ability allows geckos to climb in areas where many predators cannot. Scientists studying the evolution of setae have identified three closely related species of gecko, only one of which can adhere to smooth surfaces. A model of the evolutionary relatedness between these species is represented in the figure. G. humeralis Can adhere O Cannot adhere 2 O G. concinnatus O G. antillensis Which of the following statements is an accurate interpretation of the labeled branch points on the model? Location 1 represents the common ancestor of only two of the three species.
- House sparrows (Maya) were introduced to North America in 1852. Since that time thesparrows have evolved different characteristics in different locations. Sparrow populations inthe north are larger-bodied than sparrow populations in the south. This divergence inpopulations is probably at least partly a result of natural selection: larger-bodied birds canoften survive lower temperatures than smaller-bodied birds can. Colder weather in the northmay select for larger-bodied birds. What type of evolution based on natural selectionaccounts for this observation? Explain your answer.Snakes evolved from ancestors who had the ability to walk. Some snakes, in fact, still have small pelvis and leg bones that are remnants from this ancestor. What are these caled? Vestiglal structure O Homologous strucre O Sympatric structure O Molecular homology 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. Of what is this an example? Founder effectIVialii ContenL Which of the following are NOT analogous traits? OVenomous fangs in cobras and vipers Spikes on the surface of hedgehogs and cactus Live birth in anacondas and rhinos Hairlessness in seals and manatees O Pectoral flippers in whales and sharks
- In a particular population of mice, certain individualsdisplay a phenotype called short tail, which is inherited as a dominant trait. Some individuals display arecessive trait called dilute, which affects coat color.Which of these traits would be easier to eliminatefrom the population by selective breeding? Why?Which scenario would be a moder nexample of Lamarckianismm? A strain of houseflies resistant to insecticides emrges Squirrels separated by a river are found to be unable to interbreed Snails are found to have thicker shells generations after the introduction of a predator A son is bornw ith a portion of his right index finger mssing -- the same portion that was severed from his father's hand in an accident.tes es When Charles Darwin visited the Galapagos Islands, he observed the marine iguana. He later decided that the marine iguana evolved from the terrestrial iguana found on the mainland of South America. The marine iguana differs from the terrestrial iguana in several ways. The marine iguana has a flat tail, long claws and sharp teeth while the terrestrial iguana has a round tail, short claws and flat teeth. When looking at the differences between the terrestrial and the marine iguana, which of the following is not evidence that evolution has occurred? ers ences nline riods 1 and 2 Homologous structures shared between both iguanas P1, Highschool wol MP3, The biogeography of the iguanas 4 Comparative embryology of the iguanas The state of Hardy-Weinberg equilibrium present in both iguanas hu Fri The medium ground finch is one of Darwin's finches that inhabits an island in the Galapagos. It has a small beak that it uses to eat smallI, soft seeds. Irn 1977, a drought eliminated all but…
- Some people think that many of our uniquely human traits arose by sexual selection. Over thousands of years, women attracted to charming, witty men perhaps prompted the development of human intellect beyond what was necessary for mere survival. Men attracted to women with juvenile features may have shifted the species as a whole to be less hairy and softer featured than any of our simian relatives. Can you think of a way to test these hypotheses?Describe the types of mutation discussed in class and the consequences these haveforthe evolution of populations. What types of mutations are most common in naturalpopulations? Provide examples and data.Some human traits may have arisen by sexual selection. Over thousands of years, women attracted to charming, witty men perhaps prompted the development of human intellect beyond what was necessary for mere survival. Men attracted to women with juvenile features may have shifted the species as a whole to be less hairy and softer featured than any of our simian relatives. Can you think of a way to test this hypotheses?