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Arthropods ( / ˈɑːrθrəpɒd / ARTH-rə-pod) [20] are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated ( metameric) segments, and paired jointed appendages. In order to keep growing, they must go through stages of moulting ...
The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.Unlike many other biogeochemical cycles, the atmosphere does not play a significant role in the movement of phosphorus, because phosphorus and phosphorus-based materials do not enter the gaseous phase readily, as the main source of gaseous phosphorus ...
The Alismatales comprise herbaceous flowering plants of often aquatic and marshy habitats, and the only monocots known to have green embryos other than the Amaryllidaceae. They also include the only marine angiosperms growing completely submerged, the seagrasses. [2] The flowers are usually arranged in inflorescences, and the mature seeds lack ...
Rhubarb is the fleshy, edible stalks ( petioles) of species and hybrids (culinary rhubarb) of Rheum in the family Polygonaceae, which are cooked and used for food. [2] The plant is a herbaceous perennial that grows from short, thick rhizomes. Historically, different plants have been called "rhubarb" in English.
Arrowleaf elephant ear ( Xanthosoma sagittifolium ), clearly showing the characteristic spadix and spathe. The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe (or leaf-like bract ).
Etlingera elatior (also known as torch ginger, among other names) is a species of herbaceous perennial plant in the family Zingiberaceae; it is native to Indonesia, Thailand, Malaysia and New Guinea. [2] The showy pink flowers are used in decorative arrangements, and are an important ingredient across Southeast Asia .
Grain, fruit, and vegetables are basic human foods and have been domesticated for millennia. People use plants for many purposes, such as building materials, ornaments, writing materials, and, in great variety, for medicines. The scientific study of plants is known as botany, a branch of biology .
The Piperaceae ( / ˌpɪpəˈreɪʃiː / ), also known as the pepper family, are a large family of flowering plants. The group contains roughly 3,600 currently accepted species in 5 genera. The vast majority of species can be found within the two main genera: Piper (2,171 species) and Peperomia (over 1,000 species). [4]