I believe it is A, I’m torn between A and D but I’m not sure.
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.
Eukaryotes
Glucose and oxygen
Carbon dioxide and water
Carbon dioxide and water
Glucose and oxygen
<span>The stem but sometimes that does get blown over or even broken off in a really bad wind. The roots are what actually anchor the plant into the ground and stop the whole plant from blowing away.</span>