6. CYCLES IN ECOSYSTEMS

How are the nitrogen and carbon cycles similar?

Nitrogen and carbon cycles both cycle through the __atmosphere__ into ecosystems and back into the atmosphere. Carbon uses ___photosynthetic____organisms, while nitrogen uses___nitrogen___ _fixing __bacteria__ on plants.

Which microorganisms are vital to the nitrogen cycle?

nitrogen-fixing bacteria

Carbon Cycle

the process in which carbon is cycled between the atmosphere, land, water, and organisms

Nitrogen cycle

the process in which nitrogen is transferred between the atmosphere, bacteria, and other organisms

Phosphorus cycle

the process of phosphorous moving from the environment to living organisms and back into the environment

Phosphorous is important to living things because it is in: Select all that apply.

Cell membranes, Teeth, DNA, Bones< RNA

Complete the nitrogen cycle below.

1. g ammonification . 2. f ammonium (NH4+) 3. d nitrification 4. c assimilation 5. e nitrates (NO3-) 6. h nitrites (NO2-)

It is the element of life because it is found in every living or once-living organism.

Carbon

Nitrogen is important to life because it is a part of: Select all that apply.

Amino acids, RNA, DNA

How does the burning of fossil fuel affect the carbon cycle?

The more fossil fuels that are burned, the more carbon dioxide enters the atmosphere, more than can theoretically be absorbed by plants or the ocean.

The phosphorous cycle is different because it is not found in the __________ , it is cycled through _______, water, and through ________ organisms, and then ______ into the _____________.

The phosphorous cycle is different because it is not found in the ___atmosphere__, it is cycled through __ rocks__, water, and through __living__ organisms, and then __back___ into the ___environment___.

What type of plants do nitrogen-fixing bacteria live on?

legumes