fertility factor
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Fertility factor — The Fertility factor (also known as F factor or sex factor) is a bacterial DNA sequence that allows a bacterium to produce a sex pilus necessary for conjugation. It contains 20 tra (for transfer ) genes and a number of other genetic sequences… … Wikipedia
Fertility and intelligence — Demographic studies have indicated that in humans, fertility and intelligence tend to be negatively correlated, that is to say, the more intelligent, as measured by IQ, exhibit a lower total fertility rate than the less intelligent. Other… … Wikipedia
Fertility (soil) — Soil fertility is the characteristic of soil that supports abundant plant life. In particular the term is used to describe agricultural and garden soil.Fertile soil has the following properties: *It is rich in nutrients necessary for basic plant… … Wikipedia
factor — 1. One of the contributing causes in any action. 2. One of the components that by multiplication makes up a number or expression. 3. SYN: gene. 4. A vitamin or other essential element. 5. An event, characteristic, or other definable entity that … Medical dictionary
F factor — fertility factor F plasmid … Medical dictionary
F-factor — may refer to: * F factor (conversion factor), a conversion unit used in diagnostic radiology * Fertility factor, a sequence of bacterial DNA … Wikipedia
F factor — The fertility factor, a plasmid that carries the genes for bacterial conjugation and makes its E. coli host cell the gene donor during conjugation … Dictionary of microbiology
F factor — Abbreviation for fertility factor A bacterial plasmid that confers the ability to function as a genetic donor in conjugation. See: Hfr … Glossary of Biotechnology
Total fertility rate — Not to be confused with birth rate. A world map showing countries by fertility rate, 2005 2010 … Wikipedia
Sub-replacement fertility — is a total fertility rate (TFR) that (if sustained) leads to each new generation being less populous than the previous one in a given area. In developed countries sub replacement fertility is any rate below approximately 2.1 children born per… … Wikipedia
