Based on a structured interview, diagnostician a classifies an individual's personality disorder in the “odd” cluster. based on another structured interview of the same type, diagnostician b classifies an individual's personality disorder in the “dramatic” cluster. if what is described here is typical of what happens when that variety of structured interview is used, one would say the structured interview has:

Low validity and low reliability.

Explanation:

Structured interview may be defined as a type of interview in which the interviewer has already decided the question. The questions are asked in the same series during the interview.  

Diagnostician A has classified the individual as “odd” cluster. The Diagnostician B classifies an individual's personality as“dramatic” cluster. The structured interview has low reliability. The structured interview has low validity also as compared with other type of interview.

answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.