Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 18, Problem 23CTQ
Why can polyploidy individuals lead to
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What is speciation? List any two events that lead to speciation?
which statement is false?
1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span.
2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.
Which reproductive barrier is most likely to prevent interbreeding between a polyploid species and
its diploid sister species?
Behavioral isolation: the two species will not recognize each other as mates
O Gametic isolation: sperm and egg with different chromosome numbers cannot complete fertilization
Hybrid infertility: differences in chromosome numbers will result in infertile hybrids
O Mechanical isolation: differences in reproductive structures will prevent interbreeding
O Temporal isolation: the two species will not reproduce at the same time of year
Chapter 18 Solutions
Biology 2e
Ch. 18 - Figure 18.14 Which is most likely to survive,...Ch. 18 - Figure 18.22 If two species eat a different diet...Ch. 18 - Figure 18.23 Which of the following statements is...Ch. 18 - Which scientific concept did Charles Darwin and...Ch. 18 - Which of the following situations will lead to...Ch. 18 - Which description is an example of a phenotype? A...Ch. 18 - Which situation is most likely an example of...Ch. 18 - Which situation would most likely lead to...Ch. 18 - What is the main difference between dispersal and...Ch. 18 - Which variable increases the likelihood of...
Ch. 18 - What is the main difference between autopolyploid...Ch. 18 - Which reproductive combination produces hybrids?...Ch. 18 - Which condition is the basis for a species to be...Ch. 18 - Which situation is not an example of a prezygotic...Ch. 18 - Which term is used to describe the continued...Ch. 18 - Which components of speciation would be least...Ch. 18 - If a person scatters a handful of garden pea plant...Ch. 18 - Why do scientists consider vestigial structures...Ch. 18 - How does the scientific meaning of “theory” differ...Ch. 18 - Explain why the statement that a monkey is more...Ch. 18 - Why do island chains provide ideal conditions for...Ch. 18 - Two species of fish had recently undergone...Ch. 18 - Why can polyploidy individuals lead to speciation...Ch. 18 - What do both rate of speciation models have in...Ch. 18 - Describe a situation where hybrid reproduction...
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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
- Can you answer all the parts to this diagram Species 1 and 2 are sister species from which you’ve cloned related genes. On the gene tree on the top of the next page, use labels to answer the following questions: (a) Label the node that represents a gene duplication with “D,” (b) Label the nodes that represent speciation events with “S,” (c) Pick a pair of genes that are paralogs and label them both “P.” (d) Pick a pair of genes that are orthologs and label them both “O.”arrow_forwardPrezygotic isolating mechanisms prevent hybrid offspring from occurring between species because (a) the resulting offspring are not fertile and cannot reproduce. (b) the egg and sperm fuse and form a zygote, but it does not survive. (c) the egg and sperm do not ever meet or, if they do, cannot fuse to form a zygote. (d) all of the abovearrow_forwardWhole genome duplication is important in speciation by hybridization because: It creates homologous pairs of chromosomes It allows plants to self fertilize Tetraploids can hybridize with other species better than diploids can It reduces the fitness of intermediate phenotypes It increases the rate of drift in small populationsarrow_forward
- What happens to the renin angiotensin aldosterone system with hf? Identify the factor that is responsible for allopatric speciation and not for sympatric speciation? Recombinant dna technology is used to combine 2 or more strands of different dna?arrow_forwardAnisogamy is the term for sexual dimorphism in gamete size. a) Discuss the evolution of anisogamy from an ancestor in which gametes had equal size. What factors would lead to a divergence in gamete size among members of a population? b) Sexual selection can be strong in some species, and weaker in others. What determines the strength of sexual selection for a certain species? Discuss the differences in sex roles and Bateman’s Principle in your answer.arrow_forward1. What is speciation? 2. What is a “hybrid zone”? 3. What postzygotic barriers are often found in hybrid zones that result in a lack of species fusion? 4. What are the differences among the three possible outcomes for hybrids over time: reinforcement, fusion, and stability?arrow_forward
- Over time, enough genetic variations can develop within a population to cause it to undergo speciation. Identify the various mechanisms that will prevent different species from being able to reproduce successfully. Which of these mechanisms is the most influential in keeping species sperate?arrow_forward14) Hybridization was not originally recognized as a mechanism of speciation by either Darwin or the researchers of the "new synthesis". However, today there are many examples of species that have originated through hybridization. What is the best explanation for why we have so many examples of species originating through hybridization? A) Hybridization is more likely to occur in regions where scientists have put in more effort studying speciation B) Hybridization occurs fairly regularly, and when it leads to new species only takes a few generations, which is fast enough for researchers to see fairly easily C) Hybridization is fairly easy to study in captivity D) Hybridization has been carried out frequently by farmers attempting to produce new, better species to grow 15) Anthropologist who study human evolution genetically have determined that populations of our species have gone through"founder effect" type events. What data would suggest that…arrow_forwardThe Forbes sea star and common sea star are broadcast spawners that are known to hybridize, yet they exist as separate, genetically distinct species (unique branches on the tree of life). One mechanism that may contribute to their uniqueness is prezygotic reproductive isolation, which is the incompatibility of gametes (sperm and eggs) from separate species. We know they hybridize, so the eggs and sperm are compatible, but could gametes from the different species be less compatible than the gametes from each individual species? Harper & Hart (2005) addressed this question in a series of cross-fertilization experiments. Did they find evidence that gametes ‘preferred’ to cross with gametes of the same species? Explain your answer.arrow_forward
- Which reproductive barrier is most likely to prevent interbreeding between a polyploid species and its diploid sister species?arrow_forwardWhy is variation beneficial to the species but not necessary for the individual?arrow_forwardThe behavior of chromosomes during meiosis and subsequent fertilization is responsible for most of the variation that arises in each generation. Which of these processes is included in that variation? 1. Metaphase chromosomal assortment in mitosis 2. Crossing over of replicated homologues from each parent in meiosis 3. Hybridization of random fertilization during cross breeding two species 4. Range expansion of populations 5. All of the above are truearrow_forward
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