species - A group of organisms that can breed to produce fertile offspring.a substance that is produced by the reaction of an acid with a base, variation - Differences in characteristics within a species., adaptation - The features/characteristics of an organism that makes it more suited to its habitat., inherited - A type of variation caused by genes and mutations passed on by parents, Continuous - Variation that can be measured in a range., Gene - A section of DNA that codes for a protein, Double Helix - Describes the structural shape of the DNA.,

Natural selection

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恢復自動保存: ?