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Which of the following sets of evidence supports the idea that species share common ancestry?
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Similar modern species are often found living in the same areas |
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Different species share similarities at the genetic, developmental, and structural level |
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Modern populations can be observed diverging from one another, indicating the start of |
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All of the above |
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- A new species seems to be forming in areas where there is geographic separation between the divergent populations. If true, this would represent an example of: Peripatric speciation Genetic drift Sympatric speciation Adaptive radiation Allopatric speciationTwo species evolve different preferences for which tree to live on. The trees are found in the same forest and thus two species are produced from the same geographic location. This is best described as which of the following? Sympatric speciation Vicariance speciation Dispersal speciation Allopatric speciationSometimes similar structures appear in organisms due to similar environmental selective pressures and not due to ancestry (analogies). This process is called.... Group of answer choices speciation homologies evolution homoplasy
- Researchers discover two populations of monkey flower (Erythranthe) in Yellowstone National Park. One population is found near geysers and thrives near the hot water. The other population is found in the dry slopes of the mountains nearby. Both populations appear physically similar. Based solely on their observations, the researchers make an initial hypothesis that the two populations of Erythranthe are actually two separate species. This is an example of using the ____ species concept (choose the BEST answer). biological morphological ecological phylogeneticWhich 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.A factor that is always necessary for the formation of a new spieces is reproduction at different times geographic barriers different mating behaviors reproductive isolation Genetic differences between population tend to be reduced by mutation the bottleneck effect gene flow the founder effect Which of the following factor would not contribute to allopatric speciation a population is geographically separated, leaving one small population in which genetic drift occurs different mutations begin to distinguish the gene pools of the separated populations a population becomes geographically isolated from the original population gene flow between the two separated populations continues to occur an isolated population is exposed to different selective pressures than the original population Male lion having a mane while female lion is an example of intrasexual selection hybridization intersexual selection sexual dimorphism
- While donkeys and horses have ignored each other historically in the wild, hybrids can be made through artificial insemination. The resulting hybrids are unusual in that they are generally viable, but always sterile. Because of their sterility, a blended lineage of the two animals cannot exist. What evolutionary force is this an example of? A. Prezygotic barrierB. Postzygotic barrierC. Allopatric SpeciationD. Sympatric SpeciationWhich of the following statements about the DNA of two species is TRUE? The more similar the DNA, the more distant the common ancestor is likely to be. The more similar the DNA, the more recent the common ancestor is likely to be. The more different the DNA, the more likely it is that their common ancestor is extinct. You cannot conclude anything about common ancestry using DNA evidence.Make or create one question about Speciation and ecology (Nature of species, reproductiva isolation, genetic drift and natural selection, geography of speciation, adaptive radiation and biological diversity, the peace of evolution). Just one question about any of this topics.
- What is the nature of the reproductive barrier between a species that mates at dawn (sunrise) and a species that mates at dusk (sunset)? gametic temporal habitat behavioral mechanical A mountain range divides a freshwater snail species into two isolated populations. Erosion eventually lowers the range and brings the two populations together again, but when they mate, the resulting hybrids all produce sterile young. This scenario is an example of allopatric speciation gradualism punctuated equilibrium extinction sympatric speciationWhich of the following is a problem with applying the phylogenetic species concept? Some individuals we think are different species can interbreed Some individuals look exceedingly similar Increased DNA sequencing could lead to different definitions of species No one knows how to make a phylogenyTwo species of turtles belonging to the same genus occasionally cross paths in nature and attempt to mate. However the shape of their shells makes mating nearly impossible so fertilization rarely occurs. What mechanism is keeping these two turtle species separate? Mechanical isolation Behavioural isolation Geographic isolation Hybrid isolation Temporal isolation