Boris (given name) Boris, Borys or Barys (Bulgarian, Russian, Serbian, Ukrainian: Ð±Ð¾ÑÐ¸Ñ; Belarusian: Ð±Ð°ÑÑÑ) is a male name of Bulgarian origin. Nowadays, it is most widely represented in Russia, Belarus, Bosnia and Herzegovina, Bulgaria, Croatia, Republic of Macedonia, Poland, Montenegro, Serbia, Slovakia, Slovenia, and Ukraine.
A trophic level refers to a level or a position in a food chain or ecological pyramid. It is occupied by a group of organisms that have a similar feeding mode. At the base of an ecological pyramid is trophic level 1. A food chain would start as well at trophic level 1. The trophic level 1 is occupied by the primary producers (e.g. plants).
For example, if someone touches your arm, you generally turn to react. In plants, the response to a stimulus is known as a tropism. This plant movement toward or away from a stimulus can come in many forms. Before we look at a few, let's better understand the word tropism. Like many words in science, tropism comes from a Greek word. Tropos means 'to turn'. Therefore, a tropism is a turn towards or away from a stimulus. When the movement is towards the stimulus, it is called positive tropism. Likewise, when the movement is away from the stimulus, it is called negative tropism.