Which of the following is a characteristic shared by all members of the kingdom protista?
a. multicellular
b. eukaryotic
c. photosynthetic
d. heterotrophic

B. Eukaryota

Explanation:

Protists belong to an entire kingdom of organisms of "true cells". These may be a single free living cell or an aggregate of cells that forms a colony.  These organisms may live in water or areas of high humidity. They may also be land dwelling. Protists can form parasitic relationships with other organisms or they may form symbiotic relationships with other organisms like themselves or more organized.

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

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.