Antigen: is a a foreign substance or toxin that causes a immune response. Antibody: it is a blood protein that is produced in response to an antigen. White blood cell: also called a leukocyte and is a cell that counteracts against antigens. Specific: If your're talking about the biology definition then it is, of or pertaining to a species. Pathogen: a virus or bacteria that can cause a disease.
Partial pressure of carbon dioxide in the aveolar is the lowest, it is 40mmHg (millimetre mecury ) while the partial of carbon dioxide in venous blood is the highest at 45 to 50 mmHg (millimetre mecury)
You know that there is a difference between plant cells and animals cells. The plant cells have a cytoplasm while the animal cells do not. Therefore the answer must be C.
