Human cells are extremely small and tightly packed – at about 20 micrometers across, roughly one-fifth the width of a human ...
Scientists have crossed a startling new frontier in bioengineering: they can now fabricate intricate three-dimensional ...
A eukaryotic cell (left) has membrane-enclosed DNA, which forms a structure called the nucleus (located at center of the eukaryotic cell; note the purple DNA enclosed in the pink nucleus). A typical ...
In the beginning, there was boredom. Following the emergence of cellular life on earth, some 3.5 billion years ago, simple cells lacking a nucleus and other detailed internal structure dominated the ...
Prior to using this narrative, have learners create their own model of a cell in their notebooks using whatever background information or experience they might have. While exploring the narrative, ...
Jack Challoner, Gills of a fish-like invertebrate (all images courtesy Jack Challoner, from ‘The Cell: A Visual Tour of the Building Block of Life‘) In 1665, when British polymathic scientist Robert ...