<span>Both cycles are methods of viral reproduction. Both cycles involve the introduction of the virus into a cell to use the cell's genetic material to replicate more viruses.
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B and C are correct - A is incorrect as natural selection affects any generation of species. D is also incorrect as any species population change in an ecosystem inevitably affects another, even if it isn't a predator-prey relationship.
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Everything at some point belonged to a common ancestor, but these four species are considered to be like this because of similar ancestral traits that have been passed on to generations such a homologous pairs, vestigial structures, they are all mammals, similar amino acid sequences, vertebraes, etc.
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The circulatory system, and respiratory
