Select the reasons why sympatric speciation is difficult to find or document. | Diverging species occupy the same geographic location. Diverging species are in a range large enough to cause their physical separation. Geographic barriers partially isolate some populations from others. | Gene flow among diverging groups continues, despite some nonrandom mating.
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- Indicate the order in which the following steps would take place to result in Sympatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] As they adapt to their specific environments, the fitness of any hybrid formed is reduced. Reproductive isolating mechanisms are selected for so that less fit hybrids are not formed. Two species now exist. Interbreeding populations connected via gene flow occur across a range. The populations in the new environment adapt to their particular circumstances while the remainder stay as they were. Something happens so that some members of the populations/species change their environment (shift hosts; have a genetic change like polyploidy or inversions), so that they are separated from the others even thought hey are living in the same area.true or false, Sexual selection may lead to sympatric speciationThere is a fish species that lives in a lake. As the fish population grows, competition for food increases and a group of fish locates a new food source at a different depth in the lake. Over time, two populations with distinct morphologies that allow them to eat various food sources begins to occur in the lake. Which type of speciation (allopatric or sympatric) will mostly likely occur? Why?
- How is sympatric speciation different from allopatric speciation? Group of answer choices Allopatric speciation requires a geographic barrier, while sympatric speciation occurs in one place Allopatric speciation results in hybrids, while sympatric speciation does not Allopatric speciation is a result of behavioral isolation, while sympatric speciation is a result of habitat isolation Allopatric speciation occurs in one place, while sympatric speciation requires a geographic barrierWhich of the following statements is false? a. Gradual speciation is most likely to occur in a large population that lives in a stable climate. b. Punctuated equilibrium is unlikely to occur in a large population that lives in a stable climate. c. Gradual speciation and punctuated equilibrium both result in the divergence of species. d. Gradual speciation is most likely to occur in a small population that experiences a rapid change in its environment.Which of the following would NOT be a reason for a speciation event? Group of answer choices comfortable environmental conditions plentiful food supplies very few natural disasters and/or catastrophic events increased amounts of predators lack of predators
- Indicate the order in which the following steps would take place to result in Parapatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] Something happens so that the environment is different in one part of the range relative to the other, even though the populations are still contiguous. As they adapt to their specific environments, the fitness of any hybrid formed is reduced. The populations adapt to their environment in the part of the range where they live. Interbreeding populations connected via gene flow occur across a range. Reproductive isolating mechanisms are selected for so that less fit hybrids are not formed. Two species now exist.What 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.What are the most common mechanisms of sympatric speciation and in which major group of organisms does this happen most often? Distinguish between sympatric and allopatric and parapatric speciation. Which is considered the (far) more common mechanism of species formation? What does "gene flow" between populations do? Maximum of 1800 words
- Some females seem to prefer the blue color and some females seem to prefer yellow color. If this a diversifying/ disruptive selection, how could diversifying/disruptive selection result in sympatric speciation in this example?Indicate the order in which the following steps would take place to result in Allopatric Speciation [enter 1 for the first step, 2 for the second, etc; write only the number -- no words, no spaces] The two groups develop reproductive isolating mechanisms so that they no longer interbreed. Interbreeding populations connected via gene flow occur across a range. The two separate groups adapt to their new environments. Some sort of physical barrier develops to split the once contiguous population(s) into two separate groups If they come back together, any hybrids formed are less fit.What are the most common mechanisms of sympatric speciation and in which major group of organisms does this happen most often? ( 500 words min)