Examlex
Sarah and Sophie are identical twins who have another sister,Susie,who is one year older than they.Many people mistake them for triplets because they all look so much alike.It is their ____ that make other people think they are triplets.
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, controlling entry and exit of substances.
Cytoplasm
The jelly-like substance within a cell, excluding the nucleus, that contains organelles, cytosol, and is the site of numerous biochemical reactions.
Nucleus
The central and most important part of an object, movement, or group, forming the basis for its activity and growth, or in cells, a membrane-bound organelle that contains the cell's chromosomes.
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, responsible for controlling the passage of substances in and out of the cell.
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