Which of the following is definitely true about the kingdom, Protista. A. They always have a cell wall

B. They always have a nucleus

C. They are always unicellular

D. They are always heterotrophs

B. They always have a nucleus

Explanation:

The organisms belonging to kingdom Protista are single-celled- means they are unicellular and they have a well-defined nucleus enclosed in a nuclear membrane. Hence, they are eukaryotes. So the correct option is B.

B. They always have a nucleus

Explanation:

Protista always has a nucleus. So, option (B) is the correct answer.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

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