For example, root exudates from legume ... can lead to severe alterations of the nitrogen cycle in both aquatic and terrestrial ecosystems. Industrial nitrogen fixation has increased exponentially ...

A primary example of this involves the energy currency ... carbon, and energy that cycles through ecosystems (Figure 1). Using maps like these, we can compare different places, or measure primary ...

For example, if two significant figures are used in the question, then usually your answer would also be to two significant figures. Don't forget to check your rounding. Edexcel questions courtesy ...

The numbers of predators and prey for certain ecosystems such as the Canadian Lynx (wild cat) and hare have been recorded over many years and found to change in a regular cycle. A similar example ...