If one allele is not phenotypically expressed in the presence of another, we say that it is

The body is protected against harmful flu viruses by

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis