A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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Questions pertaining to red blood cells, or erythrocytes, the most common type of blood cell that is responsible for delivering oxygen throughout the body.
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Questions looking for clarifications or definitions of biological terminology.
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A state in which an organism or a cellular system, as defined by its full set of functionality, ceases to exist (i.e., most of the functions are irreversibly lost).
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Biologically-synthesized chemicals (or their derivatives) that cause growth suppression or death of bacteria. Other anti-microbials are often also considered under the class antibiotics these days.
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a single-stranded RNA virus which reproduces in human CD4-positive cells, which are primarily T-helper lymphocytes and macrophages. HIV is the causative patho…
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Ionizing electromagnetic waves, usually harmful to most biological beings.
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The timing of key events in an organism's lifetime, including development, reproduction and death.
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Questions regarding organic compounds required by an organism as a vital nutrient in limited amounts.
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The administration of antigenic material to stimulate the immune system of an individual to develop adaptive immunity to a disease.
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the study of organisms that lived in prehistoric times.
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Copying the genome for the purpose of reproduction.
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Communal living, cooperation in care of young, and/or division of labor within animal species.
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Educated guesses about the structure and function of things that do not currently exist. Many 'what if' and 'why not' questions fit this category. Questions should be posed so that they can be answere…
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Questions pertaining to the processes by which new species arise.
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The application of dynamic systems and game theory to evolving populations in biology, economics, and social sciences. It is particularly well suited for studying social dilemmas like the evolution of…
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The laboratory technique involving the extraction of DNA from a cell in a pure form.
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a biopolymer mostly made from keratin, which grows from the skin. Hair is exclusively found in mammals.
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Fruits develop from the flower of plants and hold the seeds. They are the way of plants to distribute their seeds.
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The study of how biological life arises from inorganic matter through natural processes, and the method by which life on Earth arose.
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enyzmes (usually derived from bacterial sources) which cleave DNA at defined "restriction" sites.
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the mechanism by which a disease is causing the disease. For bacteria this can be the secretion of a toxin which is toxic for the host.
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A measure of how hot or cold something is, measured in degrees Fahrenheit or Celsius, or Kelvin.
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a molecular target for a chemical signal such as a neurotransmitter, hormone, or drug. Binding of the signal to the receptor initiates or modulates behaviour in the receiving cell.
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The people-biota-environment interface: organisms used by humans, and the ways humans conceive of those organisms. This can include wild, managed or domesticated organisms used for food, medicine, and…
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Fluorescent microscopy uses the emissions of fluorescently labelled probes to generate an image.
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Protein Data Bank, a publically available database of molecular structures of proteins
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An interdisciplinary area of study in the life sciences with a focus on complex interactions and large networks of biological molecules and processes.
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Internal organ of vertebrate species which is important for a lot of biochemical functions including production of molecules, detoxification and production of glycogen.
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the respiratory organ which allows the take-up of oxygen and the release of CO2. They are present in most animals which breathe air including many fish species.
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an internal, bean shaped organ of vertebrates. Kidneys are responsible for secreting urine, regulate the electrolytes of the body and filter the blood.