1. Proteins
They are used by organisms for production of nucleic acids and repair damaged tissues. They can also be broken down to produce ATP during starvation.
2. Nitrogen
Nitrogen gas is abundant in the atmosphere but plants cannot directly absorb, they need nitrogen fixing bacteria to break it down into compounds (ammonia and nitrate) that plants can easily absorb for growth and chlorophyll build up.
3. Carbon dioxide
Used by plants to produce their own food (sugars) using energy from the sun and carbon dioxide from animals, releasing oxygen and water vapours i.e. photosynthesis.
Answer:
A is a chemical substance that organisms require to live.
The
cycle is not a nutrient cycle.
Identify the nutrients described below.
A key component in the formation of organic compounds, such as nucleic acids and ATP
Most abundant gas in the atmosphere; plants absorb it from bacteria in the soil
In every living thing; plants utilize it when they perform photosynthesis
Explanation:
