Glossary of terms related to the CBD

 

habitat
- the place or type of site where an organism or population naturally occurs. [CBD]
- the space in which an organism, population, or species lives.
habitat restoration
the return of a habitat to its original community structure, natural complement of species and natural functions.
haploid
- cell or organism that contains one set of chromosomes.
- having the number of chromosomes present in the normal germ cell equal to half the number in the normal somatic cell. [CUB]
herbs
plants or plant parts valued for medicinal, savoury, cosmetic, flavouring, or aromatic qualities. [CUB]
heterozygosity
genetic variability among individuals within populations and variability among populations.
homologous chromosomes
contain identical linear sequences of genes and pair during meiosis. [CUB]
homozygote or homozygous
- individual having two copies of the same allele at a genetic locus.
- individual having two identical alleles of a particular gene or genes, and so breeding true for the corresponding characteristics. [CUB]
horticulture
the cultivation of ornamental and vegetable plants in gardens or smallholdings (market gardens). Latin: hortus = garden. [CUB]
hotspot
- an area particularly rich in total numbers of species.
- an area of especially high pollutant concentration.
hybrid
individual organism resulting from a cross between parents of differing genotypes. Hybrids may be fertile or sterile, depending on qualitative and/or quantitative differences in the genomes of the two parents. Hybrids are most commonly formed by sexual cross-fertilization between compatible organisms, but techniques for the production of hybrids from widely differing organisms are being developed by cell fusion and tissue culture. [CUB slightly modified by JVG]
hybrid zone
region of reproduction among individuals of different species.
hybridization
- crossing of individuals from genetically different strains, populations or species.
- the act of crossing two different individual organisms of differing genetic constitution from different populations or different species. [CUB]
- a molecular procedure in which single strands of DNA and/or RNA are mixed and subsequently bind to one another. The degree of binding is a measure of the relatedness of the strands. The procedure is used to detect RNA or DNA using suitable probes. [CUB]
hypoxia
a state of low oxygen concentration in water and sediments, relative to the needs of most aerobic species.

a b c d e f g h i j k l m n o p q r s t u v w x y z

Back to GLOSSARY title page (Convention on Biological Diversity)

Home > Glossary > H

Last updated  20-12-2004 .


Belgian Clearing-House Mechanism, 2001.
On the Internet since 7 October 1996.
Contact us

Royal Belgian Institute of Natural Sciences