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the factor in an investigation that is under the control of the investigator.
teeth found at the back of the mouth just in front of the molars in the mammalian jaw, used for...
a small finger-like blind-ending extension of the mammalian large intestine connected to the...
endocrine gland situated on top of each kidney, which produces hormones in response to stresses...
refers to any variation in the nucleotides, genes, chromosomes, or whole genomes of organisms....