Genetic variation is stored in a populationâs gene poolâthe combined. alleles of all of the individuals in a population. Different combinations of. alleles in a gene pool can be formed when organisms mate and have offspring. Each allele exists at a certain rate, or frequency.
Also found in: Wikipedia. cosÂ·tal surÂ·face. the surface of certain structures that face the ribs; they are the costal surfaces of the lungs (facies costalis pulmonis [TA]) and the scapula (facies costalis scapulae [TA]).
Functions of leaves. The function of a leaf is photosynthesis â to absorb light and carbon dioxide to produce carbohydrates. The equation for photosynthesis is: Carbon dioxide and water â glucose and oxygen. Did you know: 1  Leaves are the source of all of food on the planet.2  Leaves recycle all of the world's carbon dioxide in the air.unctions of leaves. The function of a leaf is photosynthesis â to absorb light and carbon dioxide to produce carbohydrates. The equation for photosynthesis is: Carbon dioxide and water â glucose and oxygen. Did you know: 1  Leaves are the source of all of food on the planet.