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What is the general path of motion of stars in the halo and in the disk?
Horizontal Gene Transfer
The swapping of genetic material in single or multiple-celled organisms through mechanisms that bypass the "vertical" passing down of DNA from ancestor to descendant.
Phylogenetic Species Concept
A concept in biology that defines a species based on the smallest group of individuals that share a common ancestor, representing one branch on the tree of life.
Adaptation
The process by which a species becomes better suited to its environment through the development of physical, behavioral, or physiological changes.
Bacterial Species
Groups of bacteria that share certain diagnostic traits and genetic similarities, differing significantly from other bacterial groups.
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