Question

question 85 (1 point)
the surface of a healthy natural nail should be ____.
a smooth and spotted
b smooth and unspotted
c flexible and spotted
d pitted and rough

question 86 (1 point)
the medical branch of science that deals with the study of the skin, its functions, and diseases is ____.
a physiology
b histology
c dermatology
d anatomy

question 87 (1 point)
a parasitic submicroscopic particle that infects and resides in the cells of a biological organism is a ____.
a bacteria
b contaminant
c parasite
d virus

Explanation:

Question 85

A healthy natural nail's surface is typically smooth and free of spots. Option a has "spotted" which is unhealthy. Option c's "spotted" is incorrect, and nails are not mainly described as "flexible" in this context. Option d's "pitted and rough" indicates an unhealthy nail. So the correct option is b.

Physiology is the study of body functions, histology is the study of tissues, anatomy is the study of body structures. Dermatology specifically deals with the skin, its functions, and diseases. So the correct option is c.

Bacteria are single - celled organisms, a contaminant is a substance that contaminates, a parasite is an organism that lives on/ in another organism but is not submicroscopic in the way described here. A virus is a submicroscopic parasitic particle that infects and resides in cells. So the correct option is d.

Answer:

b. smooth and unspotted

Question 86