Concept explainers
Videos
To explain:
The multiregional hypothesis and the “Out of Africa” hypothesis in the context of Human evolution.
Introduction:
Human evolution is a topic of so many debates and it is based on so many hypotheses. Evolution is referred to as a change in the characteristics of the organisms in a population over a period of time. These characteristics are hereditary and passed to the offspring. The key force which leads to evolution is Natural Selection. Both these hypotheses agree that human evolution began from the African continent as the very first humans were originated there but they contradict the course of evolution of Modern Man.
Explanation of Solution
A multiregional hypothesis states that all the primitive species of man such as Neanderthals, Denisovans and archaic sapiens belonged to the same species, i.e., they are the members representing the same species. It proposes that these are like just the regional variants of the same species just like the different ethnic groups present today. Geneflow played a major role and ensured that they don’t evolve into distinct species. Inbreeding in them ensured the process of gene flow among them. Several pieces of evidence support this hypothesis such as Gene flow, fossil evidence, Y chromosome, mitochondrial DNA, etc.
Whereas “Out of Africa” hypothesis states that the African man migrated out of Africa around 100,000 years ago to the different regions of Europe, Eurasia and these migrating African species replaced the archaic human species endemic to these regions. This proposes that the African population was the first one to expand on the earth, the population in other regions such as in Europe, Asia and other regions of the earth, developed lately. They develop due to parallel evolution occurred in these species.
Human evolution is a highly unresolved mystery due to a lack of evidence and missing fossil records. Still, some scientists describe the current scenario of human evolution as a result of multi-regional evolution while others describe it as a result of “Out of Africa” hypothesis, whereas some scientists consider it a blend of these two.
Chapter 16 Solutions
Glencoe Biology, Florida Edition
Additional Science Textbook Solutions
Brock Biology of Microorganisms (15th Edition)
Biology: Life on Earth (11th Edition)
Applications and Investigations in Earth Science (9th Edition)
Chemistry & Chemical Reactivity
Microbiology with Diseases by Body System (5th Edition)
Campbell Biology (11th Edition)
- Identify the indicated cavity (Fucus). a. antheridia b. conceptacel c. receptacle d. oogonium e. none of thesearrow_forwardIdentify the indicated structure (Saprolegnia). a. antheridium O b. oospore c.sperm d. auxospore e. tetraspore Of. zygosporearrow_forwardUsing information from the primary literature (several references have been provided as a starting point below) please answer the following question: Based on your review of the literature on rewilding, what are the major scientific pros and cons for rewilding? Please note that the focus of this assignment are the (biological) scientific issues associated with rewilding. As will be discussed in class, there are a number of non-scientific issues involved or implicated in rewilding, all ultimately affecting the public acceptability of rewilding. Although these issues are important – indeed, critical – in this assignment you should focus on the biological science issues and questions. Details: You must enumerate at least two pros and at least two cons. Your answer should be no more than 500 well-chosen words, excluding references. Think carefully about how best to organize and structure your answer. Aim for high information density: say a lot, but say it succinctly. Recall Nietzche’s…arrow_forward
- Using information from the primary literature (several references have been provided as a starting point below) please answer the following question: Based on your review of the literature on rewilding, what are the major scientific pros and cons for rewilding? Please note that the focus of this assignment are the (biological) scientific issues associated with rewilding. As will be discussed in class, there are a number of non-scientific issues involved or implicated in rewilding, all ultimately affecting the public acceptability of rewilding. Although these issues are important – indeed, critical – in this assignment you should focus on the biological science issues and questions. Details: You must enumerate at least two pros and at least two cons. Your answer should be no more than 500 well-chosen words, excluding references. Think carefully about how best to organize and structure your answer. Aim for high information density: say a lot, but say it succinctly. Recall Nietzche’s…arrow_forwardNow draw a rough sketch of what the control data might look like if in addition to the specific binding, there was also a considerable amount of nonspecific binding (again using a normal dose/response curve) (do % total bound ligand vs concentration)arrow_forwardWhat are functions of cuboidal cells in the kidney? Select all that apply. Concentration of gases Dilution of chemicals Secretion of molecules Nutrition to tissues Support of tissues Absorption of moleculesarrow_forward
- question1 In plants, epithelial tissue is only found as the outermost cell layer and acts as a barrier. In humans, epithelial tissue is found inside the body as well as on the surface. What function(s) does/do epithelial tissue carry out in humans? Select all that apply. Waste storage Filtration Oxygen transport Protection Diffusion Osmosis Absorptionarrow_forwardWhat words best describes this organism? a. Unicellular/nonmotile Ob. unicellular/motile c. colonial/nonmotile d. colonial/motile e. multicelluar O f. siphonous g. none of thesearrow_forwardIdentify the phylum or class. a. Euglenophyta b. Dinoflagellata c. Bacillariophyceae d. Oomycetes e. Phaeophyceae O f. Myxomycota g. Xanthophyceae ○ h. Chrysophyceae i. Dictyosteliomycota O j. Rhodophyta Ok. Chlorophyceaens I. Charophyceaensarrow_forward
- What is produced inside the indicated structure (Fucus). a. eggs O b. antheridia ○ c. sperm d. zygotes e. none of thesearrow_forwardGreen Algae, as a group, is actually paraphyletic with one subgroup more closely related to higher plants than the other. Which of the following green algae groups is more closely related to higher plants: a. Charophyceans b. Chlorophyceans c. Rhodophyta d. Xanthophyceansarrow_forwardA single-celled green algal genus that is motile with 2 flagella, has a cup shaped chloroplast, and an eyespot: a. Volvox b. Chlamydomonas c. Euglena d. Codiumarrow_forward
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education