CAMPBELL BIOLOGY V.1 W/MAST.BIOL >CI<
15th Edition
ISBN: 9781269867115
Author: Reece
Publisher: PEARSON C
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 28.3, Problem 3CC
Summary Introduction
To determine: Which among the 3 lifecycles (Refer to Fig.13.6 “Three types of sexual lifecycles”, in the textbook) possess “alternation of generation”. Discriminate it with the other 2 lifecycles.
Concept introduction: Many lifecycles have been evolved among the algae (multicellular). The life cycle that is complex includes the alternation of generation. It means there is alternation between the multicellular diploid or the haploid forms. Thus, alternation of generation is applied to only those lifecycles, where the diploid as well as haploid, both stages exists.
Pictorial representation:
Sexual lifecycles of various organisms is represented in Fig.1.
Fig.1 “Three types of sexual lifecycles”
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
MAKE CONNECTIONS Look at Figure 12.7 and imagine the twodaughter cells undergoing another round of mitosis, yielding four cells.Compare the number of chromosomes in each of those four cells, aftermitosis, with the number in each cell in Figure 13.8, after meiosis. Whatis it about the process of meiosis that accounts for this difference, eventhough meiosis also includes two cell divisions?
WHAT IF? In 2005, Icelandic scientists reported findinga large chromosomal inversion present in 20% of northern Europeans, and they noted that Icelandic womenwith this inversion had significantly more children thanwomen without it. What would you expect to happento the frequency of this inversion in the Icelandicpopulation in future generations?
Wyckoff et al. (2000. Nature 403:304-309) have proposed that some human male
reproductive-associated genes have evolved by natural selection and not by neutral evolution. Part of the DNA sequence results of their study is shown below. Which gene(s) did seem to evolve by natural selection? Note: dn = number of substitutions per non-synonymous (replacement) sites and ds = number of substitutions per synonymous (silent) sites.
dn ds
Acrosin-Trypsin 0.138 0.064
Protamine 1 0.133 0.046
SRY 0.055 0.090
Histone H1 (testicular) 0.055…
Chapter 28 Solutions
CAMPBELL BIOLOGY V.1 W/MAST.BIOL >CI<
Ch. 28.1 - Cite at least four examples of structural and...Ch. 28.1 - Summarize the role of endosymbiosis in eukaryotic...Ch. 28.1 - Prob. 3CCCh. 28.2 - Why do some biologists describe the mitochondria...Ch. 28.2 - WHAT IF? DNA sequence data for a diplomonad, a...Ch. 28.3 - Explain why forams have such a well-preserved...Ch. 28.3 - WHAT IF? Would you expect the plastid DNA of...Ch. 28.3 - Prob. 3CCCh. 28.3 - Prob. 4CCCh. 28.4 - Contrast red algae and brown algae.
Ch. 28.4 - Why is it accurate to say that Ulva is truly...Ch. 28.4 - Prob. 3CCCh. 28.5 - Contrast the pseudopodia of amoebozoans and...Ch. 28.5 - Prob. 2CCCh. 28.5 - Prob. 3CCCh. 28.6 - Justify the claim that photosynthetic protists are...Ch. 28.6 - Prob. 2CCCh. 28.6 - WHAT IF? High water temperatures and pollution...Ch. 28.6 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 28 - Describe similarities and differences between...Ch. 28 - What evidence indicates that the excavates form a...Ch. 28 - Prob. 28.3CRCh. 28 - On what basis do systematists place plants in the...Ch. 28 - Describe a key feature for each of the main...Ch. 28 - Prob. 28.6CRCh. 28 - Plastids that are Surrounded by more than two...Ch. 28 - Biologists think that endosymbiosis gave rise to...Ch. 28 - Prob. 3TYUCh. 28 - According to the phylogeny presented in this...Ch. 28 - In a life cycle with alternation of generations,...Ch. 28 - Based on the phylogenetic tree in Figure 28.2,...Ch. 28 - Prob. 7TYUCh. 28 - SCIENTIFIC INQUIRY Applying the If then logic of...Ch. 28 - WRITE ABOUT A THEME: INTERACTIONS Organisms...Ch. 28 - SYNTHESIZE YOUR KNOWLEDGE This micrograph show's a...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- VISUALIZE Use two different colors to depict the unduplicated chromosomes of species C with larger chromosomes (2n = 8) and species D with slightly smaller chromosomes (2n = 10), and of their F1 hybrid. Is the hybrid likely to be fertile?arrow_forwardWhat distinguishes asexual reproduction from sexual reproduction? What benefit does sexual reproduction confer to species? What is the value of genetic diversity? Why? In what ways does sexual reproduction contribute to diversity? Describe the unpredictability of meiotic partner selection, random distribution, and crossover.arrow_forwardObservation 1: 1 out of 2 first trimester abortuses show abnormal karyotypes with 96% caused by numerical abnormalities and 4% with structural abnormalities. At live birth, 1 out of 160 has abnormal karyotypes with 60% caused by numerical changes. This number increases with fetuses of mothers over 35 years old to 1/50 for total incidence and 85% for numerical changes. Questions: Think of reasons why it is important to maintain the number and structure of chromosomes. Why is maternal age so important?arrow_forward
- WHAT IF? If maternal and paternal chromatids havethe same two alleles for every gene, will crossing overlead to genetic variation?arrow_forwardThe continuity of life is based on heritable information in the form of DNA. In a short essay (100–150 words), explain how chromosome behavior during sexual reproduction in animals ensures perpetuation of parental traits in offspring and, at the same time, genetic variation among offspring.arrow_forwardWHAT IF? What would the human life cycle be likeif we had alternation of generations? Assume that themulticellular diploid stage would be similar in form to anadult human.arrow_forward
- 1. Describe the three modes that prokaryotes can 'obtain' new genes. Be sure to identify similarities and differences between the three modes. How does the concept of new gene introduction change the view that prokaryotes are asexual species? 2. Describe the conditions on Earth that is thought to have favored the evolution of seed plants? What, is a seed and how is it different from a spore?arrow_forwardPlease answer fast 1. What are some challenges still today about reproductive cloning? 2. What are some ways in which a speciation event can occur? 3. What are the other species' definitionsarrow_forwardQ. What are the possible changes in chromosome number and structure that will occur in a living species with six haploid chromosomes ? You can give the phenotypic changes that will occur on a real and / or hypothetical sample.arrow_forward
- Why is variation advantageous to populations? How does this relate to species that reproduce sexually versus those that reproduce asexually? 2. Why is it important that meiosis produces a haploid cell? Hint: think about the result over multiple generations if it did not do this.arrow_forwardWHAT IF? A chicken has 78 chromosomes in its somaticcells. How many chromosomes did the chicken inheritfrom each parent? How many chromosomes are in eachof the chicken’s gametes? How many chromosomes willbe in each somatic cell of the chicken’s offspring?arrow_forwardApply Evolutionary Thinking How do human activities (such as destruction of natural habitats, diversion of rivers, and the construction of buildings) influence the chances that new species of plants and animals will evolve in the future? Frame your answer in terms of the geographical and genetic factors that foster speciation.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY