bio-, bi-, -bia, -bial, -bian, -bion, -biont, -bius, -biosis, -bium, -biotic, -biotical +

Any rock or group of minerals formed from organic material or by the action of organisms.

1. A rock of organic origin.
2. A rock that is formed from or by organic material, either by noncombustible, inorganic processes that form an acaustobiolith, or by combustible, organic processes that form a caustobiolith (a combustible organic rock).

Any limestone of an organic nature such as a reef rock or stromatolite.

1. Referring to biology.
2. Pertaining to the products and operations of applied biology.
3. Any virus, therapeutic serum, toxin, antitoxin, or analogous product of plant or animal origins used in the prevention, diagnosis, or treatment of disease; for example, vaccines, and blood plasma products.

1. Pertaining to living organisms or life processes.
2. A reference to the products and operations of applied biology.
3. Any substance, as a serum or vaccine, derived from animal products or other biological sources and used to treat or to prevent disease.

The accumulation within living organisms of toxic substances occurring in the environment.

A branch of anthropology that deals with humans as biological organisms, including areas; such as, primatology, human genetics, human ecology, paleoanthropology, and fields of applied anthropology; such as, anthropometrics and forensic anthropology.

Any child conceived rather than adopted by a specified parent, and therefore, carrying genes from the parent.

The internal mechanism of an organism that regulates circadian rhythms (daily cycles of activities) observed in many living organisms and various other periodic cycles.

The mechanism of the biological clock has long proved elusive; however, a molecular basis for such a clock in the fruit fly Drosophila has been discovered, and similar mechanisms may well apply in other organisms.

It is based on the cyclical rise and fall in the concentrations of certain proteins which form part of a negative feedback loop that controls transcription of their own genes.

All of the organisms inhabiting a given area.

The use of natural predators or parasites, instead of chemicals, to control pests.

The most famous successful example was the introduction of the gray moth, Cactoblastis cactorum, into Australia to control the prickly pear, Opuntia inermis, which was over running vast tracts of land. The moth's caterpillars eat the shoots of the plant.

Another example is the introduction of parasitic wasps that lay their eggs inside the eggs of pest insects; such as, corn borers that attack corn (maize).

Populations of insect pests may also be reduced by releasing sterile males to mate with the females, or by using sex-attractant chemicals (pheromones) to trap males or females.

The amount of radiation absorbed in biological material.

An area of radiation dosimetry that uses the biological damage produced by radiation to estimate radiation doses.

The amount of a substance that is sufficient to bring about some significant physiological changes in the affected organism.

Specifically, the level of exposure to a toxic substance that is required to produce a harmful effect.

A natural father.

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