Adventitious, in botany, refers to structures that develop in an unusual place, and in medicine, it refers to conditions acquired after birth. Botany is the scientific study of plant life. ... Medicine is the branch of health science and the sector of public life concerned with maintaining human health or restoring it through the treatment of disease and injury. ...

Adventitious roots arise from branches, stems and leaves. These roots usually grow when in places where the plant is in contact with soil or water. Adventitious buds develop from places other than the end of an apical meristem, which occur at the end tip of stems and branches. These buds are formed after the plant is wounded or pruned to replace lost branches. Some plants also have shoots that come out of their roots, which can extend quite a distance from the plant. This can be a form of reproduction in some species. Primary and secondary roots in a cotton plant In vascular plants, the root is that organ of a plant body that typically lies below the surface of the soil (compare with stem). ... A stem is the above ground axis of a vascular plant. ... In botany, a leaf is an above-ground plant organ specialized for photosynthesis. ... Divisions Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants Adiantum pedatum (a fern... Soil is material capable of supporting plant life. ... Flower buds have not yet bloomed into a full-size flower. ... In microeconomics, pruning taken as a metaphor from gardening, refers to the removal of excess items from a budget. ... For other uses, see Reproduction (disambiguation) Reproduction is the biological process by which new individual organisms are produced. ... In biology, a species is the basic unit of biodiversity. ...