Question

Describe the transfer and transformation of matter as it cycles through ecosystems - Nitrogen cycle:

a) Nitrogen cycle involves only atmospheric nitrogen
b) Nitrogen fixation occurs only in plants
c) Nitrogen is cycled through biotic and abiotic components
d) Nitrogen has no role in ecosystem matter cycles

Answer 1

The nitrogen cycle is a biogeochemical cycle that involves the recycling of nitrogen through the biotic and abiotic components of ecosystems. Nitrogen fixation is an important process in this cycle, where nitrogen gas is converted into a usable form for plants. The cycle is facilitated by microorganisms through various processes like decay, nitrification, and denitrification.

Step-by-step explanation:

The nitrogen cycle is a biogeochemical cycle through which nitrogen is recycled through the biotic and abiotic components of ecosystems. Nitrogen makes up 78 percent of Earth's atmosphere, but plants cannot use atmospheric nitrogen directly. They need nitrogen in the form of nitrates, which can be absorbed through their roots. This process is called nitrogen fixation and is carried out by nitrogen-fixing bacteria. The nitrogen cycle involves four main processes: nitrogen fixation, decay, nitrification, and denitrification, all of which are mediated by microorganisms.