generation - a group of individuals born and living at about the same time, histogram - a graph that uses bars to show how characteristics or values are distributed within a group, inherit - to receive genes from a parent, natural selection - the process by which the distribution of traits in a population changes over many generations, non-adaptive trait - a trait that makes it less likely that an individual will survive in a specific environment, offspring - an organism produced as a result of reproduction, organisms - living things, such as plants, animals, and bacteria, population - a group of the same type of organism living in the same area, predator - an animal that hunts and kills other animals for food, prediction - an idea about what might happen that is based on what you already know, prey - an animal that is hunted or killed by another animal for food, protein molecule - a type of large molecule that performs important functions inside organisms, selection pressure - something in the environment that affects an individual’s chances of surviving, sexual reproduction - the process in which two parents pass on their genes to create offspring, species - a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group, survive - to stay alive, trait - a specific characteristic of an individual organism, variation - any difference in traits between individual organisms, mutation - a random change to a gene that sometimes results in a new trait, adaptive trait - a trait that makes it more likely that an individual will survive in a specific environment, ancestor - a related organism from a previous generation, feature - a characteristic that all members of a species have, cause - an event or process that leads to a result or change, chromosome - a long piece of DNA that contains many genes, distribution - the number of individuals with each trait in a population, DNA - a type of molecule that genes and chromosomes are made of, effect - a result or change that happens because of an event or process, environment - everything (living and nonliving) that surrounds an organism, gene - an instruction for making a protein molecule, gene version - a specific form of a gene that provides instructions for making a particular protein molecule,

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