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Columbidae (/kəˈlʌmbɪdiː/ kə-LUM-bih-dee) is a bird family consisting of doves and pigeons. It is the only family in the order Columbiformes. These are...

A sex toy is an object or device that is primarily used to facilitate sexual pleasure, such as a dildo, artificial vagina or vibrator. Many popular sex...

In biology, homeostasis (British also homoeostasis; /hɒmioʊˈsteɪsɪs, -miə-/) is the state of steady internal physical and chemical conditions maintained...

In the English language, many animals have different names depending on whether they are male, female, young, domesticated, or in groups. The best-known...

Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation...

A landrace is a domesticated, locally adapted, often traditional variety of a species of animal or plant that has developed over time, through adaptation...

Smooth (soft) muscle is one of the three major types of vertebrate muscle tissue, the other being skeletal and cardiac muscle. Nonetheless, it is found...

Nerium oleander (/ˈnɪəriəm ... / NEER-ee-əm), commonly known as oleander or rosebay, is a shrub or small tree cultivated worldwide in temperate and subtropical...

Abstinence is the practice of self-enforced restraint from indulging in bodily activities that are widely experienced as giving pleasure. Most frequently...

Sawfish, also known as carpenter sharks, are a family of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse...

A transgene is a gene that has been transferred naturally, or by any of a number of genetic engineering techniques, from one organism to another. The introduction...

Haplogroup G (M201) is a human Y-chromosome haplogroup. It is one of two branches of the parent haplogroup GHIJK, the other being HIJK. G-M201 is most...

The substantia nigra (SN) is a basal ganglia structure located in the midbrain that plays an important role in reward and movement. Substantia nigra is...

Epistasis is a phenomenon in genetics in which the effect of a gene mutation is dependent on the presence or absence of mutations in one or more other...

The International Society for Computational Biology (ISCB) is a scholarly society for researchers in computational biology and bioinformatics. The society...

Antithrombin (AT) is a small glycoprotein that inactivates several enzymes of the coagulation system. It is a 464-amino-acid protein produced by the liver...

The horned screamer (Anhima cornuta) is a species of bird that belongs to a relatively small family, the Anhimidae, which occurs in wetlands of tropical...

The age of consent for sexual activity refers to an age at or above which an individual can engage in unfettered sexual relations with another who is of...

Endocrine glands are ductless glands of the endocrine system that secrete their products, hormones, directly into the blood. The major glands of the endocrine...

Iniidae is a family of river dolphins containing one living genus, Inia, and four extinct genera. The extant genus inhabits the river basins of South America...