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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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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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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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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Microanatomy of cells and tissues
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the ability to perceive sound by detecting vibrations through an organ such as the ear.
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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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Communal living, cooperation in care of young, and/or division of labor within animal species.
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enyzmes (usually derived from bacterial sources) which cleave DNA at defined "restriction" sites.
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Copying the genome for the purpose of reproduction.
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the study of organisms that lived in prehistoric times.
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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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The study of the electrical properties of biological cells and tissues.
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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 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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The laboratory technique involving the extraction of DNA from a cell in a pure form.
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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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Ionizing electromagnetic waves, usually harmful to most biological beings.
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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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The genetic alteration of a cell resulting from the direct uptake, incorporation, and expression of exogenous genetic material from its surroundings.
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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 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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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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Organisms whose cells contain organelles, complex structures enclosed within membranes, in particular a nucleus.
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Fluorescent microscopy uses the emissions of fluorescently labelled probes to generate an image.
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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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different forms of many possible alternative forms of the same gene. The different eye colors are for example different alleles of the genes that make the eye color.
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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.