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Masturbation is a form of autoeroticism in which a person sexually stimulates their own genitals for sexual arousal or other sexual pleasure, usually to...

The American bison (Bison bison; pl.: bison), commonly known as the American buffalo, or simply buffalo (not to be confused with true buffalo), is a species...

The sweet potato or sweetpotato (Ipomoea batatas) is a dicotyledonous plant in the morning glory family, Convolvulaceae. Its sizeable, starchy, sweet-tasting...

Peptides are short chains of amino acids linked by peptide bonds. A polypeptide is a longer, continuous, unbranched peptide chain. Polypeptides that have...

Monocotyledons (/ˌmɒnəˌkɒtəˈliːdənz/), commonly referred to as monocots (Lilianae sensu Chase & Reveal), are flowering plants whose seeds contain only...

Solanum melongena is a plant species in the nightshade family Solanaceae, grown worldwide for its edible fruit, typically used as a vegetable in cooking...

Ferns (Polypodiopsida or Polypodiophyta) are a group of vascular plants that reproduce via spores and have neither seeds nor flowers. They reproduce in...

Sexual stimulation is anything that leads to sexual arousal or orgasm. This thing can be physical or of other senses, and is known as a stimulus. Sexual...

Apoptosis (from Ancient Greek: ἀπόπτωσις, romanized: apóptōsis, lit. 'falling off') is a form of programmed cell death that occurs in multicellular organisms...

Malus (/ˈmeɪləs/ or /ˈmæləs/) is a genus of about 32–57 species of small deciduous trees or shrubs in the rose family Rosaceae. It includes the domesticated...

A seahorse (also written sea-horse and sea horse) is any of 47 species of small marine bony fish in the genus Hippocampus. Having a head and neck suggestive...

Metamorphosis is a biological process in which an animal undergoes a conspicuous and relatively abrupt change in its body structure as part of its development...

Sardines Sardine and pilchard are common names for various species of small, oily forage fish in the herring suborder Clupeoidei. The term "sardine" was...

The sternum (pl.: sternums or sterna) or breastbone is a long flat bone located in the central part of the chest. It connects to the ribs via cartilage...

The Protein Data Bank (PDB) is a database for the three-dimensional structural data of large biological molecules such as proteins and nucleic acids, which...

Antioxidants are compounds that inhibit oxidation, a chemical reaction that can produce free radicals. Antioxidants are frequently added to industrial...

In biology, polymorphism is the occurrence of two or more clearly different morphs or forms, also referred to as alternative phenotypes, in the population...

Paraphilias are sexual interests in objects, situations, or individuals that are atypical. The American Psychiatric Association, in its Diagnostic and...

A model organism is a non-human species that is extensively studied to understand particular biological phenomena, with the expectation that discoveries...

Prunus is a genus of flowering trees and shrubs from the rose family (Rosaceae) that produce stone fruits, or drupes. As of March 2024[update], the genus...