The word “they” in paragraph 3 refers to A. protozoans B. microscopes C. investigations D. colonies

The word “they” in paragraph 3 refers to

A. protozoans
B. microscopes 
C. investigations 
D. colonies

Trả lời

Đáp án A

(1) Protozoans are considered animals because, unlike pigmented plants to which some protozoans are otherwise almost identical, they (protozoans) do not live on simple organic compounds

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