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Down: 1) The process by which unrelated species become more similar as they adapt to the same kind of environment2) A group of photosynthetic, unicellular prokaryotes4) Anatomical structure in one species that is similar in function and appearance, but not in evolutionary origin, to another anatomical structure in another species6) A group of unicellular organisms that live in extremely harsh environments8) Plant-like structures in the ocean that give off oxygen9) A measure on an individual's hereditary contribution to the next generation10) The selective breeding of organisms (by humans) for specific desirable characteristics12) Anatomical structures that occur in different species and that originated by heredity from a structure in the most recent common ancestor of the species14) The remains of traces of an organism that died long ago15) The development of new types of organisms from preexisting types of organisms overtime16) Length of time it takes for 1/2 of any size sample of an isotope to decay to a stable form18) All living things come from other living things Across: 3) A gas molecule that is made up of three oxygen atoms5) A trait that makes an individual successful iin it's environment7) The process by which two or more related but reproductively isolated populations become more and more dissimilar11) The evolution of two or more species that is due to mutual influence, often in a way that makes a relationship more mutually beneficial13) Life appears from non-living things17) A structure in an organism that is reduced in size and function and that may have been complete and functional in the organism's ancestors19) Something in the air that spontanously caused life to grow20) A mutually beneficial relationship in which one organism lives within another21) The process by wich individuals that are better adapted to their environment, survive and reproduce more successfully than less well adapted individuals22) Branching diagram that shows the relationships by ancestry between different species or other taxonomic groups
 

 

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