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Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant in response to gravity pulling on it. It also occurs in fungi. Gravity can be either "artificial gravity" [clarification needed] or natural gravity. It is a general feature of all higher and many lower plants as well as other organisms.
A heterotroph (/ ˈ h ɛ t ər ə ˌ t r oʊ f,-ˌ t r ɒ f /; [1] [2] from Ancient Greek ἕτερος (héteros) 'other' and τροφή (trophḗ) 'nutrition') is an organism that cannot produce its own food, instead taking nutrition from other sources of organic carbon, mainly plant or animal matter. In the food chain, heterotrophs are ...
An example of a topological food web (image courtesy of USDA) [1] The soil food web is the community of organisms living all or part of their lives in the soil. It describes a complex living system in the soil and how it interacts with the environment, plants, and animals. Food webs describe the transfer of energy between species in an ecosystem.
Food cycle is an obsolete term that is synonymous with food web. Ecologists can broadly group all life forms into one of two trophic layers, the autotrophs and the heterotrophs. Autotrophs produce more biomass energy, either chemically without the sun's energy or by capturing the sun's energy in photosynthesis, than they use during metabolic ...
A social movement which promotes the consumption of locally produced foods, and particularly the serving of such foods at public establishments such as restaurants and school cafeterias. This is usually accomplished by purchasing food directly from the farmers or producers (rather than an intermediate retailer), or by the restaurant or school ...
Social media allows for mass cultural exchange and intercultural communication, despite different ways of communicating in various cultures. [226] Social media has affected the way youth communicate, by introducing new forms of language. [227] Novel acronyms save time, as illustrated by "LOL", which is the ubiquitous shortcut for "laugh out loud".
Thinking of plants as lives that serve their own purposes opens up a distinct way of understanding our connection to them. They are independent from us and yet knowable; otherworldly and yet familiar.
Auxotrophy is the opposite of prototrophy, which is characterized by the ability to synthesize all the compounds needed for growth. Prototrophic cells (also referred to as the ' wild type ') are self-sufficient producers of all required metabolites (e.g. amino acids , lipids , cofactors ), while auxotrophs require to be on medium with the ...