Gases are constantly consumed and produced by cellular and metabolic reactions in most living things, so an efficient system for gas exchange between, ultimately, the interior of the cell(s) and the external environment is required. Small, particularly unicellular organisms, such as bacteria and protozoa, have a high surface-area to volume ratio.
Polyploid. (genetics) an organism or cell having more than twice the haploid number of chromosomes.Of a cell or organism having more than twice the haploid number of chromosomes; a polyploid cell; a polyploid species .Organisms that possess two sets of each chromosome.
Polyploid plants are generated in an effort to create new plants that have new characteristics. Sometimes the polyploidy plants are sickly and not viable, but sometimes the polyploid plants have larger leaves and flowers.Orchid growers will often sell polyploidy plants that are larger or have larger flowers.Often the polyploid nature of the plant is included in the cultivar name (G. species âbig flower 4Nâ).ometimes the polyploidy plants are sickly and not viable, but sometimes the polyploid plants have larger leaves and flowers. Orchid growers will often sell polyploidy plants that are larger or have larger flowers. Often the polyploid nature of the plant is included in the cultivar name (G. species âbig flower 4Nâ).