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.
Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..
The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..