The_variable is part of the experiment that is being tested or the part that is changed by the person doing the experiment (fill in the blank)

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.