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Chromosomes can be either single armed or double armed. When a cell is about to divide, a chromosome replicates its genetic material to become a double armed chromosome. A double armed chromosome has a ce...

Granules of plastic powder are poured or fed into a hopper which stores it until it is needed. A heater heats up the tube and when it reaches a high temperature a screw thread starts turning. A motor turn...

-Large surface area to volume ratio: the lungs contain millions of microscopic air sacs called alveoli, which are the sites of gas exchange in the lungs. The large number of alveoli means that the lungs h...

Unicellular organisms have a large surface area to volume that is one cell thick, therefore they have a short diffusion distance and are metabolically inactive. Therefore, they can obtain sufficient oxyge...

Starting by factorising the curve equations: the first one factorises to y = (x-3)(x-2) and the second one becomes y=(2-x)(2+x). From this, a rough sketch of the curves can be drawn and it can be seen tha...