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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The discussion of the anatomy and evolution of eyes. Consider using the "vision" tag for questions regarding how the brain interprets information from the eyes.
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The area of physiology dealing with the production and effects of hormones.
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Any substance consumed to provide nutritional support for the body.
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The theory by which mutations in the genetic code lead to differences from the previous phenotype that, should they be advantageous to an organism's survival to reproductive age, may be passed on to o…
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The study of blood, the blood-forming organs, along with blood diseases and their treatment.
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The study of genomes, the entire set of genes in an organism.
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The study of the physiology of the nervous system, with emphasis on transcellular communication, and cellular and molecular processes involved in neural communication.
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a method of replicating DNA exponentially from even a single molecule.
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used or the meaning of words as used in scientific literature. Questions should ideally include a link or quote as context for where the term was encountered.
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globular proteins that catalyze a biochemical reaction, increasing the overall rate by reducing activation energy. Most chemical reactions in a cell need enzymes in order to occur at rate…
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The use of methods from the physical sciences to aid in the study of biological systems.
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Questions relating to biological theory or theoretical developments that deals with biological processes.
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A change in an organism's genomic sequence.
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harnessed to assemble organic compounds (esp. glucose) from inorganic carbon dioxide.
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Questions related to the study of the distributions and changes of allele frequency in a population.
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The contractile tissue of animals derived from the mesodermal layer of embryonic germ cells.
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The process through which a biological organism grows to maturity. In certain contexts it can mean the changes the organism goes through over its entire lifetime.
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Questions on the classification of biological organisms, and the methods used for classifying them.
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Models that analyse biological systems or processes using the tools of applied mathematics.
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a small infectious agent that can replicate only inside the living cells of an organism. Virology is the study of viruses.
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Questions relating to the study of birds.
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A single piece of DNA coiled and organized along with RNA and proteins found in the cell.
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The study of animal behaviour.
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Virology deals with the study of viruses, infectious entities that require the machinery of a host cell to replicate.
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The biological process characterized by reversible unconsciousness, unresponsiveness to external stimuli and motor passivity.
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The study of the appropriate provisions required to sustain life in an organism or the provisions themselves.
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The scientific study of short- and long-term changes in the size and age composition of populations and the processes driving these changes.
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The set of actions performed by an organism within a given environment
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The process that produces a complementary strand of RNA from a section of DNA or (rarely) other RNA.
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The study of the internal structure of organisms.
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the process of growing and maintaining living cells in vitro.
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Questions pertaining to populations of organisms.
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The process of biological aging or the state of an organism being biologically old.
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A selectively-permeable biological membrane that separates the interior of all cells from the outside environment.
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Organs playing some role in digestion: the breaking down of food into smaller components that can be up-taken and used as source of energy or stucture.
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Questions related to mammals.