Analysis of information sources in references of the Wikipedia article "இயக்கம் (விலங்கியல்)" in Tamil language version.
During development, any change in cell shape is preceded by a change in gene activity. The cell's origin and environment that determine which transcription factors are active within a cell, and, hence, which genes are turned on, and which proteins are produced.
Protozoa are microscopic, one-celled organisms that can be free-living or parasitic in nature.
"capacity of movement," 1827, from French motilité (1827), from Latin mot-, stem of movere "to move" (see move (v.)).