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In zoology, indeterminate growth refers to the condition where animals grow rapidly when young, and continue to grow after reaching adulthood although at a slower pace. [1] It is common in fish, amphibians, reptiles, and many molluscs. [2]
These stolon-like rhizomes are long and thin, with long internodes and indeterminate growth with lateral buds at the node, which mostly remain dormant. [citation needed] In potatoes, the stolons [15] start to grow within 10 days of plants emerging above ground, with tubers usually beginning to form on the end of the stolons. [16]
Modular organisms [3] have indeterminate growth forms (life stages not set) through repeated iteration of genetically identical modules (or individuals), and it can be difficult to distinguish between the colony as a whole and the modules within. [4] In the latter case, modules may have specific functions within the colony.
A cell can only be indeterminate (also called regulative) if it has a complete set of undisturbed animal/vegetal cytoarchitectural features. It is characteristic of deuterostomes—when the original cell in a deuterostome embryo divides, the two resulting cells can be separated, and each one can individually develop into a whole organism.
Lygodium are unusual in that the rachis, or midrib, of the frond is thin, flexible, and long, the frond unrolling with indeterminate growth and the rachis twining around supports, so that each frond forms a distinct vine. The fronds may be from 3–12 m (9.8–39.4 ft) long, depending on the species.
All plant organs arise ultimately from cell divisions in the apical meristems, followed by cell expansion and differentiation. Primary growth gives rise to the apical part of many plants. The growth of nitrogen-fixing root nodules on legume plants such as soybean and pea is either determinate or indeterminate. Thus, soybean (or bean and Lotus ...
Skeletal reconstruction of an indeterminate species of Hybodus. Hybodus species typically grew to about 2 metres (6.6 ft) in length, with larger specimens of H. hauffianus reaching about 3 metres (9.8 ft). [7] It possessed a streamlined body shape similar to modern sharks, with two similarly sized dorsal fins. [8]
Marine annelids may account for over one-third of bottom-dwelling animal species around coral reefs and in tidal zones. [47] Burrowing species increase the penetration of water and oxygen into the sea-floor sediment, which encourages the growth of populations of aerobic bacteria and small animals alongside their burrows. [51]