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A circadian rhythm (/sərˈkeɪdiən/), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours. Circadian rhythms can refer to any...

This article contains Ethiopic text. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Ethiopic characters...

The American mink (Neogale vison) is a semiaquatic species of mustelid native to North America, though human introduction has expanded its range to many...

Spider monkeys are New World monkeys belonging to the genus Ateles, part of the subfamily Atelinae, family Atelidae. Like other atelines, they are found...

The Eurasian magpie or common magpie (Pica pica) is a resident breeding bird throughout the northern part of the Eurasian continent. It is one of several...

An ectotherm (from the Greek ἐκτός (ektós) "outside" and θερμός (thermós) "heat"), more commonly referred to as a "cold-blooded animal", is an animal in...

Sexual abstinence or sexual restraint is the practice of refraining from sexual activity for medical, psychological, legal, social, philosophical, moral...

The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes (red blood cells). For human...

A ratite (/ˈrætaɪt/) is any of a group of mostly flightless birds within the infraclass Palaeognathae. They are mostly large, long-necked, and long-legged...

In anatomy, a tubercle (literally 'small tuber', Latin for 'lump') is any round nodule, small eminence, or warty outgrowth found on external or internal...

Larrea tridentata, called creosote bush and greasewood as a plant, chaparral as a medicinal herb, and gobernadora (Spanish for "governess") in Mexico,...

Phosphofructokinase-1 (PFK-1) is one of the most important regulatory enzymes (EC 2.7.1.11) of glycolysis. It is an allosteric enzyme made of 4 subunits...

Magnesium is an essential element in biological systems. Magnesium occurs typically as the Mg2+ ion. It is an essential mineral nutrient (i.e., element)...

Staphylococcus epidermidis is a Gram-positive bacterium, and one of over 40 species belonging to the genus Staphylococcus. It is part of the normal human...

The Mauritian flying fox (Pteropus niger), also known as Greater Mascarene flying fox or Mauritius fruit bat is a large megabat species endemic to Mauritius...

Rubia tinctorum, the rose madder or common madder or dyer's madder, is a herbaceous perennial plant species belonging to the bedstraw and coffee family...

Neural coding (or neural representation) is a neuroscience field concerned with characterising the hypothetical relationship between the stimulus and the...

Ammonia transporters (TC# 1.A.11) are structurally related membrane transport proteins called Amt proteins (ammonia transporters) in bacteria and plants...

The wildlife of Chad is composed of its flora and fauna. Bush elephants, West African lions, buffalo, hippopotamuses, Kordofan giraffes, antelopes, African...

Richard Michael Durbin FRS (born 1960) is a British computational biologist and Al-Kindi Professor of Genetics at the University of Cambridge. He also...