in biology, the unit of structure and function of which all plants and animals are composed. The cell is the smallest unit in the living organism that is capable of integrating the essential life processes.he size of the nucleolus is a function chiefly of the cellâs ribosome requirement; the nucleolus is, therefore, especially large in a cell that intensively synthesizes proteins. Protein synthesis, the end result of chromosome function, occurs mainly in the cytoplasm.
In physical oceanography, the significant wave height (SWH or H s) is defined traditionally as the mean wave height (trough to crest) of the highest third of the waves (H 1/3).
To describe a wave, you need to know a few of its properties. One property is its wavelength. For a sound wave, this corresponds to how high or how low a note sounds. For a light wave, it corresponds to the colour of light. Another property is the amplitude, which corresponds to loudness for a sound wave or brightness for a light wave. One of the basic characteristics of a wave is its wavelength. This is the distance from one peak, or crest, to the next.