Natural selection can sometimes help improve human health and other times is ineffective at improving human health. Explain one example of how selection has helped human health, and explain one example of how selection cannot help human health (including giving a reason why selection was or was not effective for each case). You

Natural selection can sometimes help improve human health and other times is ineffective at improving human health. Explain one example of how selection has helped human health, and explain one example of how selection cannot help human health (including giving a reason why selection was or was not effective for each case). You

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 3RQ: Which of the following situations will lead to natural selection? a. The seeds of two plants land...

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Suppose there is a type of deleterious mutation in a particular human gene that causes death very late in life. Such mutations happen in about one in every million births, and can be passed on to descendants. Which statement about this allele is false? At equilibrium, the frequency of this allele will be zero. Selection against this mutation is weak compared to an allele that causes death at an earlier age. Medical advances that extend human lifespan will increase selection against this allele. Selection against this allele depends on the rate of extrinsic mortality.
In many cases, one type of organism puts selection on another, so they evolve together. For example, flowers and the pollinators. This is called artificial selection Above statement True or False? give explanation
Which of the following situations will lead to natural selection? a. The seeds of two plants land near each other and one grows larger than the other. b. Two types of fish eat the same kind of food, and one is better able to gather food than the other. c. Male lions compete for the right to mate with females, with only one possible winner. d. all of the above
Explain how artificial selection is like natural selection
The domestication or breeding of animals to have as pets, livestock on farms, or for work purposes is a form of artificial selection. Charles Darwin used these practices to support his theory of species change by natural selection. How is artificial selection similar to natural selection? When animals with favorable traits are bred with animals with unfavorable traits, the offspring will have favorable traits, so breeders were changing species by removing certain traits. For artificial selection to work, only the strong survive to reproduce. By breeding animals with specific traits, breeders were able to produce a wide variety of breeds within a short period of time. Artificial selection involves breeding two different species and determining if a hybrid organism can be produced.
Consider this example. On a tropical island, there are iguanas that are green, blue, and yellow. The green iguanas can camouflage in the green grass, the yellow iguanas can camouflage in the dry, yellow grass. And the blue iguanas try to run fast to get away from prey. Over time, the blue iguanas disappear on the island, while the green and yellow iguanas survive. What type of natural selection is this? A. Balancing or Stabilizing selection B. Disruptive or Diversifying selection C. Directional selection D. Sexual selection
Which of the following best describes natural selection? O It is a guess made by scientists about how life develops, but it has no hard evidence to support it. It is the idea that the strong survive and the weak die off. It is the idea that organisms with genetic traits that improve their ability to reproduce are more likely to pass those traits on to future generations. It is the idea that organisms naturally increase in complexity and intelligence with time.
Which statement is accurate about natural selection? It is a biological process that prevents species from adapting to significant changes in their environments. It is a biological process that leads a population to have a widespread expression of an advantageous trait. It is a biological process that allows a population to have a competitive advantage in many environments. It is a biological process that causes certain traits to be expressed less with each subsequent generation.
When discussing natural selection and behaviour, we often say that members of a species have certain behavioural traits because those traits are adaptive, in the sense that they increase inclusive fitness relative to alternative forms of those traits that have existed in the past. Instead of emphasizing the adaptiveness of behavioural traits, some biologists describe natural selection as a process that operates on nervous system traits, increasing the prevalence within a population of particular patterns of neural circuitry and neurobiological mechanisms. As an alternative to emphasizing either the behaviour or the nervous system, some biologists describe natural selection as a process that operates on genes; according to this perspective, certain forms of certain genes (ie., particular alleles) increase in prevalence within a population relative to alternative forms of those genes. Which, if any, of these three perspectives on natural selection and behaviour do you think is the most…
Explain in your own words what natural selection is and how it works.
Consider the roles of different types of selective pressure. Part A: Compare and contrast sexual selection, artificial selection, and natural selection. Part B: Give examples of traits that may be favored in sexual selection, artificial selection, and natural selection. For each, explain if the trait would be favored by one type of selection but selected against by another type of selection. BI 1000 MacBook Air O00 F1 F2 F3 F4 F5 F6 F7 F8 $ % & * 2 3 4 6.
In your own words, how does Competition and selection support natural selection? Use at least 1 example from the Beaks of Finches lab in your answer.