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Example of how a telestrator might annotate a medical image shared during a telemedicine session. The telestrator was invented by physicist Leonard Reiffel , who used it to draw illustrations on a series of science shows he did for public television 's WTTW in Chicago in the late 1950s.
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun. The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
Tropisms are usually named for the stimulus involved; for example, a phototropism is a movement to the light source, and an anemotropism is the response and adaptation of plants to the wind. [2] Tropisms occur in three sequential steps. First, there is a sensation to a stimulus. Next, signal transduction occurs. And finally, the directional ...
Telestrations is a party game in which players are prompted to sketch a word listed on a card, then guess what the other players have drawn. The game is produced by The Op (USAopoly). The game is produced by The Op (USAopoly).
Chemotropism is defined as the growth of organisms navigated by chemical stimulus from outside of the organism. It has been observed in bacteria, plants and fungi. [1] A chemical gradient can influence the growth of the organism in a positive or negative way.
Gravitropism is an integral part of plant growth, orienting its position to maximize contact with sunlight, as well as ensuring that the roots are growing in the correct direction. Growth due to gravitropism is mediated by changes in concentration of the plant hormone auxin within plant cells.
Botany is a natural science concerned with the study of plants.The main branches of botany (also referred to as "plant science") are commonly divided into three groups: core topics, concerned with the study of the fundamental natural phenomena and processes of plant life, the classification and description of plant diversity; applied topics which study the ways in which plants may be used for ...
The chemical origin of life hypothesis suggests that life originated in a prebiotic soup with heterotrophs. [16] The summary of this theory is as follows: early Earth had a highly reducing atmosphere and energy sources such as electrical energy in the form of lightning, which resulted in reactions that formed simple organic compounds , which ...