Arelationship in which one species benefits and the other is unaffected is called

How can you tell the difference between rough er from smooth er?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different