What was the variable in Pasteur's experiment?
A. meat sealed in jars that didn’t have contact with air
B. a swan neck flask that prevented air from getting in
C. uncovered meat that had contact with air
D. a straight neck flask to allow air to get in

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 part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Describe the two types of vascular tissue