A phylogenetic tree,<span> or </span>evolutionary tree,<span> is a branching </span>diagram<span> or "</span>tree<span>" showing the inferred </span>evolutionary<span> relationships among various biological </span>species<span> or other entities </span>based upon similarities and differences in their physical or genetic characteristics. The taxa joined together in the tree are implied to have descended from a common ancestor<span>.</span><span />
The structure<span> of cells is linked to </span>their function<span>. For example, lung cells are very thin, which allows gases to diffuse easily through the cells</span>
As heat and pressure increase, ductile deformation becomes more likely
The requirements for sexual reproduction, is that the species has both a Male and Female gender if they are both this also still applies as long as they don't breed with themselves.Sexual reproduction helps prevent disfigurements, that can end up killing an entire generation of animals and also can lead to a species adapting to environments faster.
