题目内容

Chemicals, cells, tissues, , systems, organism. What belongs in the blank?

A.organs
B.genes
C.enzymes
D.nuclei

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The root that means “cell” is:

A.spher
B.cyt
C.fibr
D.gen

The root that means “tissue” is:

A.hist
B.cellul
C.cyst
D.hem

The suffix in biology and pathology means:

A.inflammation
B.excision
C.tumor
D.study of

The control center of the cell is the:

A.membrane
B.ribosome
C.virus
D.nucleus