Buna, Texas - Demographics. 1  As of the census [1] of 2000, there were 2,269 people, 865 households, and 626 families residing in the CDP.
3. To give and receive reciprocally, as things of the same kind; to barter; to swap; as, to exchange horses with a neighbor; to exchange houses or hats. Exchange forgiveness with me, noble Hamlet. (Shak) Synonym: to barter, change, commute, interchange, bargain, truck, swap, traffic. Origin: cf.OF. Eschangier, f. Echanger. See exchange. 1. The act of giving or taking one thing in return for another which is regarded as an equivalent; as, an exchange of cattle for grain. 2.
Adaptation is one of the two main processes that explain the diverse species we see in biology, such as the different species of Darwin's finches. The other is speciation (species-splitting or cladogenesis), caused by geographical isolation or some other mechanism.