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Understanding Race

Chapter 13, Problem 5

According to the most accepted scientific hypothesis about the origin of two new species from a single common ancestor, most new species arise when                   . a. many mutations occur; b. populations of the ancestral species are isolated from one another; c. there is no natural selection; d. a supernatural creator decides that two new species would be preferable to the old one; e. the ancestral species decides to evolve

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Hello everyone. And in today's video we have the following problem. Groups of similar individuals that can interbreed freely and produce fertile offspring are referred to us. So we're looking for what, which one of the following answer choices can fit this definition that we see here. Let's begin by ecosystem. These ecosystems are used these large areas that have similar biotic and a biotic factors. So these biotic factors are going to be the living organisms and these periodic factors are going to be things like ph light temperature and more. So this is not going to be describing or or or questions that we're going to cancel it out. We don't have bio which is very similar to ecosystem. However, it only contains is in areas that contain this chair. A biotic factors are going to be ph light and temperature that we discussed. It is also not going to describe what our question is just stating for us, we're going to cancel it out. And then moving on, we have the biological population. Now. This is where it gets interesting. Biological population can be described as groups of individuals or inhabiting a certain this area. However, they do not go into this definition that we hear that they can interbreed freely and that they can produce fertile offspring population or simply a group of individuals. This all left us with answer choice A a species. Species just like humans, we're able to interpret freely and create fertile offspring which is the offerings such as our Children are able to then just produce more offerings. This makes us as a species and that is exactly what the question is describing. So we're going to highlight answer choice A as being our final answer. Thank you very much for sticking around until the end of this video. I really hope this helped you.
Related Practice
Textbook Question
Add labels to the figure that follows, which illustrates the three steps required for speciation to occur.

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Textbook Question
How are hypotheses about the evolutionary relationships among living organisms tested?
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Textbook Question
Which of the following is an example of a prefertilization barrier to reproduction? a. A female mammal is unable to carry a hybrid offspring to term; b. Hybrid plants produce only sterile pollen; c. A hybrid between two bird species cannot perform a mating display; d. A male fly of one species performs a 'wing-waving' display that does not convince a female of another species to mate with him; e. A hybrid embryo is not able to complete development
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Textbook Question
For two populations of organisms to be considered separate biological species, they must be                   . a. reproductively isolated from each other; b. unable to produce living offspring; c. physically very different from each other; d. A and C are correct; e. A, B, and C are correct
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Textbook Question
The biological definition of 'race' corresponds to all of the following except: a. the genealogical species concept; b. the idea that subgroups within the same species can be distinguished from each other by ancestry; c. there is a natural hierarchy of groups within a species from 'lowest' to 'highest' forms; d. it should be possible to identify races on the basis of shared allele frequencies among populations; e. races within a species are not reproductively isolated from each other.
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Textbook Question
All of the following statements support the hypothesis that humans cannot be classified into biological races except: a. There is more genetic diversity within a racial group than average differences between racial groups; b. Alleles that are common in one population in a racial group may be uncommon in other populations of the same race; c. Geneticists can use particular SNP alleles to identify the ancestral group(s) of any individual human; d. There are no alleles found in all members of a given racial group; e. There is genetic evidence of mixing among human populations occurring thousands of years ago until the present.
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