Question

fill in the blank question
the short hair - like extensions that function to move substances across the surface of a cell are called
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Explanation:

In cell biology (a subfield of Biology, which is part of Natural Science), cilia are short, hair - like structures on the cell surface. Their main function is to move substances across the cell surface. For example, in the respiratory tract, cilia move mucus and trapped particles out of the lungs. So the short hair - like extensions that function to move substances across the surface of a cell are cilia.

Answer:

cilia