What are the characteristics that all mammals have in common? Ecologists estimate the size and density of populations using quadrats and the mark-recapture method. Could individuals of a species look different today than individuals of the same species did many generations ago? What additional genetic factors increase the resemblance between siblings? Does the mechanism produce a change in individuals or populations? How does evolution occur in a species? The answer to this question is not well understood, but it is thought that a number of things would need to happen in order for one species to change into two species over time. Yes, some individuals can change a little and pass those changes on to their offspring. These ducks spent time on both land and water. To test this hypothesis, the researcher tagged 20 lizards with long horns and 20 lizards with short horns in each of two locations: Desert Valley, where there are no predatory birds, and Cactus Corner, where there are predatory birds. Many generations later, almost all the birds had the slightly larger beaks. Using one of these four ideas, explain why you do not look like another person in this room. Q6.5. But if the malesor the preferences of the femaleswere to change, the species are still closely enough related that they could probably still mate successfully. Why or why not?Yes, all individuals can change a little and pass those changes on to their offspring.Yes, some individuals can change a little and pass those changes on to their offspring.Yes, some individuals with certain traits are more likely to survive and pass those traits on to their offspring.No, species do not change even after many generations, so individuals of the same species would not look different.Q6.6. For example, a shark uses its electrosensory and olfactory organs predominately to interact with its environment, whereas primates are heavily dependent upon vision. Yes, some individuals can change a little and pass those changes on to their offspring. Be as specific as possible. What is the reason for the phenotypic differences between individuals of the same species? Give an example of how these mechanisms have impacted evolution in a species. Selection acts on variation in ______; however, evolution depends on variation among _______. At an early stage of development, both species have the same embryonic tissues, but it disappears in one of the species at a later time. Yes, some individuals can change a little and pass those changes on to their offspring. The most common mechanism for this is natural selection, in which individuals with beneficial heritable traits reproduce more than organisms without these traits, causing an increase in the frequency of the trait within the population. The latest findings, published in the journal Science Advances, suggest the differences may depend on just a few genes with an outsized role in the evolution of the birds' appearance. Why has nature decided to create exactly two genders (for humans and animals) and not 3 or 5 for example? Explain. Here's how it works. How is it the same? Mosquitoes in the population learned to adapt to the high levels of DDT in the environment. There are at least 4 different ways that humans have genetic variation, a. Humans shape their environment in ways that other organisms cannot. Why or why not? How are modern humans distinct from Paranthropus robustus? Which genes are different among species is more important than just the number of genes that are different., Available for everyone,funded by donors like you. *. Which of the following conditions would biologists say was required for the evolution of DDT resistance in a population? Could pitcher plants genetically evolve or mutate to become similar to small carnivorous animals in the coming years (100, 200 or even 1,000)? b) Yes, some individuals can chang; How is this best explained?Ducks with less webbing worked harder than ducks with more webbing to eat aquatic plants. A characteristic of an organism that can change in res. Why do humans share lots of DNA with both rats and bananas when each of these are very different things? Humans have genetic diversity than chimpanzees. Miriam wanted a new pet. Which of the following is NOT a potential benefit of genetic engineering? Campagna points out that to a certain degree there may be a cultural element involved, tooa female picks a bird colored like her father or other relatives. But we are much more alike than we are different. Are all americans equally able to become engaged in government what factors make it more possible fo? Nam risus ante, dapibus a molestie consequat, ultrices ac magna. b. just other multicellular animals. 2003-2023 Chegg Inc. All rights reserved. The pigweed has evolved to withstand the Roundup. According to the diagram, which of the following statements is true? Why are there more species of insects than mammals and birds? (b) Which is important for evolutionary change and why? The different color genes could be turned on at a certain time, or turned off, be slightly on, or slightly off. 3. A. no way to pass environment or acquired characteristics to offspring, only genes. This can result from random processes called genetic drift, or a more adaptive mechanism called natural selection. Why or why not? Consider a population that lacks variation and no individual has any advantageous traits. Why do humans try to save and treat every human life while other creatures are selected by natural selection? Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. Could two genetically perfect humans have all the genetic diversity needed for a species? For example, if one individual of a species had a mutation that caused them to have red eyes, while the other individuals of the species had the normal allele for eye color, the individual with the mutation would stand out. The birds with larger beaks were better at eating the large seeds, so only the birds with larger beaks got enough food to survive, reproduce, and pass the trait of large beaks to the next generation. Could individuals of a species look different today than individuals of the same species did many generations ago? Yes, all individuals can change a little and pass those changes on to their offspring Yes, some individuals can change a little and pass those changes on to their offspring Yes, some individuals with certain traits are more likely to survive and pass those traits on to their offspring No, species do not change even after many generations, so Why or why Why did monkeys and lions evolve differently in the same environment? Why or why not?Yes, all individuals can change a little and pass those changes on to their offspring.Yes, some individuals can change a little and pass those changes on to their offspring.Yes, some individuals with certain traits are more likely to survive and pass those traits on to their offspring.No, species do not change even after many There is no definitive answer to this question, but there are some interesting theories that can be considered. While webbed feet were evolving in ancestral ducks, with each generation:Most ducks had about the same amount of webbing on their feet as their parents.Most ducks had more webbing on their feet than their parents.Most ducks had less webbing on their feet than their parents.The amount of webbing on ducks feet had no relationship with the amount their parents had.Q6.9. Why do different genders of the same animal evolve differently? If so, how do modern humans differ from them? How genetically different must a mutated individual be to be considered a different species? Genetic variations that alter gene activity or protein function can introduce different traits in an organism. Yes, all individuals can change a little and pass those changes on to their offspring. Human-made tools of prehistoric times 2.5 million years ago show that humans began to memorize information in steps. (a) Two or more unrelated species change independently of each other and the environment in which they live (b) Two or more related species change to become less similar due to living in different environments (c) Two or more. Do any of our fossil relatives or other species share some aspects of this unique set of characteristics? Done, onec aliquetpulvinar tortor nec facilisis. Does the question reference wrong data/reportor numbers? This indicates that: A. Two important measures of a population are population size, the number of individuals, and population density, the number of individuals per unit area or volume. c. A change in heritable traits over time occurs at. What is culture and how does culture differ between human and nonhuman primates? Is it possible for two different genes to imply different phylogenetic relationships among a group of species? In Module 2 we will dive deep into 3 different AI writing programs to see how each one works and how they can best serve you in your writing endeavors. Become a Study.com member to unlock this answer! Evolution is a biological term that can . All information of this website is published in good faith and for general information purposes only. Take note of any potential side effects associated with these supplements too - some ingredients could cause allergic reactions or digestive problems if taken in excess amounts, so . On demand UK streaming service with common turnover of in style free movies. Many years ago, more than 13 different species of birds migrated to the islands. What does. Any action you may take upon the information you find on this website is strictly at your own risk. Why or why not? In genetics, two organisms are part of the same population if: \\ a. B. environment and acquired characteristics will no affect populations, only individuals C. natural selection c. Since humans evolved, where are all the other human variations resulting from random genetic mutations? Question Could individuals of a species look different today than individuals : 425869. Variation allows some individuals to do better than others, so those variations are selected. 2. B) glucose Conditions have changed in significant ways everywhere on earth, with some of these changes happening suddenly and others more gradually. What makes modern humans (Homo sapiens) unique in terms of our biological and cultural adaptations? Why are these genes similar but not identical? Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). The smallest and largest snails would be the most likely to reproduce. In contrast, humans have many more microRNA molecules (miRNAs) than these animals. Theyre very easy to distinguish. (Listen to recordings from our Macaulay Library archive: Dark-throated Seedeater, Marsh Seedeater, and Tawny-bellied Seedeater.). All other trademarks and copyrights are the property of their respective owners. I'm watching with my students! An ideal solenoid (N1N _ { 1 }N1 turns, length L1L _ { 1 }L1, radius r1)r _ { 1 } )r1) is placed inside another ideal solenoid (N2N _ { 2 }N2 turns, length L2>L1L _ { 2 } > L _ { 1 }L2>L1, radius r2>r1r _ { 2 } > r _ { 1 }r2>r1) such that the axes of the two coincide. The amount of webbing on a duck's feet is a heritable trait. These rocks were once below the ocean surface. Could individuals of a species look different today than individuals of the same species did many generations ago? Where the Dark-throated Seedeater has a black throat, for instance, the Marsh Seedeaters throat is white and the Tawny-bellied Seedeaters is the same tawny color as its belly. Will evolution occur if there is no variation in a population, if the only variation is acquired and not inherited or if all progeny survive and equally reproduce? Pellentesque dapibus efficitur laoreet. Was the final answer of the question wrong? Privacy Policy. The latest findings, published in the journal Science Advances, suggest the differences may depend on just a few genes with an outsized role in the evolution of the birds appearance. Explain! Why is it necessary to take enough time before making a decision? What causes variation in a species? While webbed feet were evolving in ancestral ducks, with each generation: Most ducks had about the same amount of wobbing on their feet as their parents. What caused us to become so different? This changed the way that humans reproduced and evolved, which in turn, changed the way that humans look today. This textbook can be purchased at www.amazon.com. The graphs below represent her findings.What can you conclude from the researchers results?The hypothesis that longer horns offer greater protection against predation is supported.The hypothesis that longer horns offer greater protection against predation is NOT supported.The experiment is well designed, but the results are inconclusive about the hypothesis.The experiment is not well designed to test the hypothesis. Over more recent history, during the last 10,000 years, there have been significant changes for humans to . Why or why not? A population is a group of individuals of the same species. They would do this by breeding a Poodle with a Husky. 2. The current 13 finch species are the only species that survived. Calculate the concentration in units of ppb and determine whether the sample exceeds the legal limit of 10.0 ppb. His observations of the embryos lead him to conclude that the species share a common ancestry. A trait with a genetic basis that increases the fitness of an individual with the trait in a particular environment, compared to individuals lacking the trait. In sympatric speciation, groups from the same ancestral population evolve into . Anaximander of Miletus (c. 610546 BC) proposed that the first animals lived in water, during a wet phase of the Earth's past, and that the first land-dwelling ancestors of mankind must have been born in water, and only spent part of . Which of the following is NOT an example of gene technology? Why do humans, animals, and plants have to evolve reproductive function? Why or why not? Genetic variation within a species can result from a few different sources. In this position, she presents the maximum cross-sectional area and thus maximizes the air-drag force on her. Explain your answer. If humans evolved from a common ancestor we share with monkeys, why do we have such broad variations in physical features across our species (i.e. Why is genetic variation within a species important to conservation? Lettuce, broccoli and spinach may look and taste fairly normal but Studies done in the early 2000 . Describe a study an evolutionary biologi. What species are humans today? The most complete fossil individual of this species is known as the 'Turkana Boy' - a well-preserved skeleton (though minus almost all the hand and foot bones), dated around 1.6 million years old. Explain some reasons why humans have been able to expand in number and distribution to a greater extent than most other animals. A major difference among finch species is in their beaks: both size and shape vary greatly.