The conversion of nitrates into nitrogen gas which is then released into the atmosphere. This is caused by bacteria and how they obtain their energy. A small amount is converted to usable forms by lightning in a process called atmospheric nitrogen fixation.
This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..
This tutorial recognizes the importance of food as a source of energy that will fuel many biological processes. A good d..
This tutorial elaborates on the effect of light on plant growth. It describes how different plants require different amo..
Learn about the general structure of a eukaryotic gene, the transcription factors, and post-transcriptional regulation....