The keyboard can type letters, numbers and punctuation, and also lets you control the computer, using special keys like the START button, and the arrow keys. A Dvorak keyboard is an alternative layout. A keyboard is most commonly attached to a computer via USB port.
3.0 Effects of temperature on aquatic biota. Temperature has long been recognized as an important environmental factor in both terrestrial and aquatic ecosystems in regard to its pivotal role over biological activity (development, growth and reproduction).emperature reductions to stream environments in winter may result from the loss of insulation of the forest canopy under clear-cut conditions in combination with increased radiant cooling; accelerated freezing may lead to anchor ice formation and minimize interstitial habitat for juvenile fish (Hicks et al.
By an large, the system is affected by temperature, light, nutrients, availability of water, wind. The ocean ecosystem is affected by all these except for water, but even state of the water is affected by the salt content, called âsalinityâ. Obviously the temperature varies from well below freezing, for example in sea ice where some things live, to about 40 Â°C in tropical regions..