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.
Polyps are abnormal growths of tissue that can be found in any organ that has blood vessels. They are most often found in the colon, nose, or uterus. Most polyps are noncancerous (benign).However, because polyps are due to abnormal cell growth, they can eventually become cancerous (malignant).Whether or not a polyp is cancerous can be determined with a biopsy.ost polyps are noncancerous (benign). However, because polyps are due to abnormal cell growth, they can eventually become cancerous (malignant). Whether or not a polyp is cancerous can be determined with a biopsy.