3) Illustrate the observed pattern of relatedness of organisms versus adaptations to specific conditions. This means...
3) Illustrate the observed pattern of relatedness of organisms versus adaptations to specific conditions. This means the biogeographic pattern of closely related groups of organisms showing adaptations to very different conditions and distantly related organisms looking superficially similar to each other by way of adaptations to a similar environment.
Homework Answers
two types of patterns are observed organisms in relation to adaptation
convergent evolution
divergent evolution
biogeographical patterns tell us how species are related to each other.
convergent evolution: when distantly related organisms looking superficially similar to each other by way of adaptations to a similar environment. Convergent evolution can be technically defined as the development of similar features as a result of independent evolution from different ancestral traits. i.e. 2 very unrelated organism will show similarity in many features due to environmental conditions.these are the adaptations in response to the same selective pressures. For example, a totally unrelated organism of the same geographic conditions acquire similar traits through independent evolution .this happens because of their similar life pattern or the same environmental conditions. Without having the same ancestral lineage these organisms will show similar traits.
divergent traits: when closely related groups of organisms showing adaptations to very different conditions. Divergent evolution is the accumulation of certain differences between very closely related species which eventually; lead to speciation. Due to some environmental conditions, two organism of closely related species develop some features different from the other, these are the adaptations to different factors which ultimately become inherent and passed onto progeny leading to speciation. This occurs when the organism of same species live in two different environmental conditions.
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