Which of these serves as a reference for comparison during a scientific investigation?

group of answer choices

test variable (independent variable)

hypothesis

outcome variable (dependent variable)

control group

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.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science