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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Biology
- What are three biological ways in which diversity and variation arises in individuals of species? In other words, why do siblings not look exactly alike? Answer:arrow_forwardExplain the biological species concept. Why is it not a perfect definition of a species?arrow_forwardExplain why translocations contribute to speciation.arrow_forward
- why are reproductive barriers essential in speciation?arrow_forwardDistinguish between morphological,phylogenetic and biological species concept. What are the advantages and disadvantages of each . What ration is common to each of the species definition that we considered? Why do species definition matter in conversation biologyarrow_forwardWhat are five geographic barriers that might lead to allopatric speciation?arrow_forward
- 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_forwardThe biological species concept defines a species by its morphology. In other words all members of the same species look alike? True or false?arrow_forwardThe biological species concept depends on the existence of barriers to reproduction. What are they? Does this species concept apply in all situations? Think of an example from nature where the biological species concept would NOT be that applicable. Which species concept would be better in this example? How does speciation occur? What environmental factors might contribute to speciation? Can an individual speciate? Use terminology for the two kinds of speciation we have learned about. What is “gene flow”? What does it mean if there is NO gene flow? Two groups of individuals are separated by either side of a canyon. One researcher found that they do not cross the canyon at any point. The group on the north side have fluffy tails and thicker coats, and they do not eat moss. The south side individuals eat moss almost exclusively, have a thin coat and tail, but otherwise are generally identical. When in the lab they mated successfully, and the offspring of that mating also mated…arrow_forward
- What is speciation continuum?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
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