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Diatoms can be obtained from multiple sources. [86] Marine diatoms can be collected by direct water sampling, and benthic forms can be secured by scraping barnacles, oyster and other shells. Diatoms are frequently present as a brown, slippery coating on submerged stones and sticks, and may be seen to "stream" with river current.
denotes someone who studies a certain field (the field of _____-logy); a specialist; one who treats Greek λογιστής (logistḗs), studier, practitioner (lit., accountant) oncologist, pathologist-logy: denotes the academic study or practice of a certain field; the study of Greek -λογῐ́ᾱ (-logíā) base noun for the study of something
The main discussion of these abbreviations in the context of drug prescriptions and other medical prescriptions is at List of abbreviations used in medical prescriptions. Some of these abbreviations are best not used, as marked and explained here.
In this field, the form and structure are examined as well as the changes or developments in the organism. It is descriptive and functional. Basically, it covers the gross anatomy and the microscopic (histology and cytology) of living beings. It involves both development anatomy and the anatomy of the adult.
Biopsy – is a medical test commonly performed by a surgeon, interventional radiologist, or an interventional cardiologist involving extraction of sample cells or tissues for examination to determine the presence or extent of a disease. Biostatistics – are the application of statistics to a wide range of topics in biology.
Some pennate diatoms also exhibit a fissure along their longitudinal axis. This is known as a raphe, and is involved in gliding movements made by diatom cells; motile diatoms always possess a raphe. In terms of cell cycle , vegetative cells are diploid and undergo mitosis during normal cell division .
A frustule is the hard and porous cell wall or external layer of diatoms. The frustule is composed almost purely of silica, made from silicic acid, and is coated with a layer of organic substance, which was referred to in the early literature on diatoms as pectin, a fiber most commonly found in cell walls of plants.
English: A single diatom at first look may not seem to be a cell, but diatoms are eukaryotic organisms with common organelles such as a nucleus, mitochondria, and golgi complex.