Relating to biology or living organisms
two conditions are essential to support biological growth: nutrients and moisture
A cavity in a nuclear reactor designed to permit the placing of living organisms near the core in order to test the biological effects of radiation.
Not involving or derived from biology or living organisms
Measurement of the concentration, potency, or other properties of a substance by its qualitative or quantitative effect on living cells or organisms.
A pest or pathogen.
Any of the branches of biology; these sciences collectively.
A shield used for protection against radiation, especially one covering a nuclear reactor or cyclotron.
A species as defined by biological relationships between its members, rather than by morphological or other features thought to be distinctive of it; especially a group of organisms constituting a distinct and genetically related population whose members produce fertile offspring by breeding among themselves and generally not with members of other populations.
The proportion of the nutrients from a food, especially a protein, that can become incorporated into the tissues of the body, or be used by it as energy; specifically the percentage of nitrogen from a particular protein source absorbed by the body that is not excreted.
The use of toxins of biological origin or microorganisms as weapons of war
A biological agent harmful to plants, animals, or people, especially a pathogen, deployed as a weapon to cause widespread devastation.
Of or relating to marine biology.
An innate mechanism that controls the physiological activities of an organism which change on a daily, seasonal, yearly, or other regular cycle
The control of a pest by the introduction of a natural enemy or predator
The study of chemical processes relevant to biology, or of biological processes at the biochemical or molecular level; biochemistry and molecular biology.
The attribution of sole or excessive importance to biological factors in the determination of intelligence, behaviour, development, etc.
(In early use) modification of the (especially urban) human environment to improve public health; (in later use) = bioengineering.
The spread of an organism or species into an area formerly free of it, typically with detrimental effects such as the displacement or extinction of native species, destabilization of the invaded ecosystem, etc.; an instance of this.
A membrane of biological origin; especially that surrounding a cell or organelle and consisting chiefly of a lipid bilayer.
The branch of psychiatry concerned with the biological basis for mental disorders, typically using physical methods or medication (as opposed to psychotherapy) as treatment.
The relative numbers of plant species per biological type (as aerophytes, hygrophytes, phanerophytes, etc.) occurring in a particular ecosystem, each expressed as a percentage of the total.
Of or relating to molecular biology.
= physical anthropologist.
= physical anthropology.
A specialist or expert in biological psychiatry.