Biology

Biology, 09.08.2019 19:20, aprilkenedy12

Two species of fish had recently undergone sympatric speciation. the males of each species had a different coloring through which the females could identify and choose a partner from her own species. after some time, pollution made the lake so cloudy that it was hard for females to distinguish colors. what might take place in this situation?

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Biology, 28.07.2019 03:00, fernandezvela27

Females of the species drosophila pseudoobscura respond less well to the courtship signals from males of their close relative drosophila persimilis than they do to those of males of their own species. this is an example of [a] gametic isolation. [b] hybrid infertility. [c] behavioral isolation. [d] adaptive radiation. [e] sympatric speciation.

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Biology, 06.10.2019 07:30, Squara

Two species of fish have been found together in five different lakes. the larger, bottom-dwelling species feeds on large prey close to shore. a surface-dwelling species feeds on small plankton in open water. dna analysis shows that the two species in each lake are more closely related to each other than they are to any of the other fish species in the lakes. however, they are reproductively isolated. these two species are likely to have arisen due to a. allopatric speciation. b. allopolyploidy. c. sympatric speciation. d. polyploidy. e. autopolyploidy.

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Biology, 09.10.2019 17:20, salmirakayy4579

Drag the terms on the left to the appropriate blanks on the right to complete the sentences. reset adaptive radiation allopatric speciation sympatric speciation polyploid speciation reproductive barriers 1. in , a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or genetic drift. 2. in , a new species may arise as mating and gene flow are reduced between populations that share the same area. 3. many plant species have formed by , in which accidents in cell division result in extra sets of chromosomes. 4. both allopatric speciation and sympatric speciation depend on the establishment of , which prevent(s) gene flow between a new species and its parent species. 5. occur(s) when a species gives rise to many new species after colonizing a region with diverse habitats. submitrequest answer provide feedback next

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Biology, 15.11.2019 03:31, u8p4

Researchers placed males and females of two fish species together in aquarium tanks. one tank had natural light and the other had a monochromatic orange light. under normal light, the males of the two species appear quite different. however, under the monochromatic light little difference between the males of the two species can be observed. the researchers recorded the mate choices of the females in each tank. under normal light the females strongly preferred males of their own species. in monochromatic light, females chose mates indiscriminately. the hybrids that resulted of interspecies reproduction were both viable and fertile. based on the data, which description of genetic and phenotypic variation in the fish populations is most likely true?

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