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Crab ( Pachygrapsus marmoratus) on Istrian coast, Adriatic Sea. Crabs attract a mate through chemical ( pheromones ), visual, acoustic, or vibratory means. Pheromones are used by most fully aquatic crabs, while terrestrial and semiterrestrial crabs often use visual signals, such as fiddler crab males waving their large claws to attract females.
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
Definition. Pediculosis pubis is an infestation by the pubic louse, Pthirus pubis, a wingless insect which feeds on blood and lays its eggs (nits) on mainly pubic hair. Less commonly, hair near the anus, armpit, beard, eyebrows, moustache, and eyelashes may be involved. [ 1][ 2][ 3] Although the presence of pubic lice is associated with the ...
The basic corn crib consists of a roofed bin elevated on posts. Another typical early American design has walls slanted outward. Most of the larger designs have an open space in the middle for accessing corn and promoting airflow. In larger designs, this space was often used to store wagons. By the early 20th century, the term "corn crib" was ...
Biology is the scientific study of life. [ 1 ] [ 2 ] [ 3 ] It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. [ 1 ] [ 2 ] [ 3 ] For instance, all organisms are made up of cells that process hereditary information encoded in genes , which can be transmitted to future ...
In mammalian anatomy, the cribriform plate ( Latin for lit. sieve -shaped ), horizontal lamina or lamina cribrosa is part of the ethmoid bone. It is received into the ethmoidal notch of the frontal bone and roofs in the nasal cavities. It supports the olfactory bulb, and is perforated by olfactory foramina for the passage of the olfactory ...
Cribbing (horse), a bad habit of some horses. Infant bed, called a crib in American English. Manger, a trough or box to hold food for animals. Mid-morning break for a snack, in Cornish dialect. Nativity scene, a depiction of the birth of Jesus as described in the gospels of Matthew and Luke. Timber crib dam, a dam built with heavy timbers in ...
3' untranslated region (3'-UTR). Also three-prime untranslated region, 3' non-translated region (3'-NTR), and trailer sequence.. 3'-end. Also three-prime end.. One of two ends of a single linear strand of DNA or RNA, specifically the end at which the chain of nucleotides terminates at the third carbon atom in the furanose ring of deoxyribose or ribose (i.e. the terminus at which the 3' carbon ...