Vaccination increases the number of . different receptors that recognize a pathogen epitopes that the immune system can recognize MHC molecules that can present an antigen lymphocytes with receptors that can bind to the pathogen

the missing space is phylum

i believe the answer is pupils are unequal and non-reactive

the pupil of both eyes has different size, so you could say the pupil is unequal. pupil has muscle that makes it able to constrict itself according to the light intensity. when the doctor direct their flashlight to the eye, pupil should be constrict to reduce the light intensity. if the pupil doesn't change their diameter, it is called unresponsive.