Concept explainers
To explain: The definition of species.
Introduction: It was a difficult job for researchers to describe the origin of living organisms. Different views of the researchers have been put to explain the origin of different organisms on earth. The work of Darwin helped to understand the origin of living organisms with his scientific theory of evolution.
To describe: The role of geographic isolation and reproductive isolation in the process of
Introduction: Species are the group of potentially breeding individuals that share distinctive attributes in nature. The manner in which new species are formed is called speciation. Distinctive traits arise due to natural selection. Reproductive isolation and geographic isolation can lead to speciation.
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EBK BIOLOGY
- Compare the forms of speciation that are slow to those that occur more rapidly. Make a list of the slow and fast forms. With regard to mechanisms of genetic change, what features do slow and rapid speciation have in common? What features are different?arrow_forwarda) How many of the gene trees do you expect to look like the species tree? b) You observe three gene trees in which species X and Z are the closest relatives and seven gene trees where X and Y are the closest relatives. What can you conclude from these data? Group of answer choices Historical hybridization between species W and X Historical hybridization between species X and Y Historical hybridization between species X and Z Historical hybridization between species Y and Zarrow_forwardExplain the Process of Speciation ?arrow_forward
- Describe how pre-zygotic, post-mating and post-zygotic isolation mechanism lead to variation and eventual speciation.arrow_forwardWhat is a reason that speciation can occur? Organisms within a species are brought into closer proximity by a physical barrier. Organisms within an ecosystem make adaptions that involve different breeding times or interactions. Organisms develop traits that are not beneficial to their survival, and these traits are passed from generation to generation. Organisms develop traits that are beneficial and pass on the same traits to all future generations within the same species.arrow_forwardOver 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_forward
- Define Species. Explain the types of speciation and the steps that lead to speciation. Provide examples and interpret dataarrow_forwardDifferentiate the different pattern-based species concept.arrow_forwardAre geographic barriers universal for all species? If not, name a geographic barrier that might block gene flow for one species but not another.arrow_forward
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