See Papaver somniferum Opposite leaves branches

A pair of leaves or branches that occur on opposite sides of each node on a stem. Optical microscope

The light microscope, as opposed to an electron microscope. There are two basic types of light microscope. A compound microscope has two sets of lenses; the first set is called the objective, and it determines the resolution. The second set is called the eye-piece, and it determines to final magnification. A dissecting microscope consists of two compound microscopes so aligned that they focus on a single point. This provides stereoscopic vision. A dissecting microscope has a low magnification and it is used for delicate operations that require vision in depth.

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