Answer:
Photosynthesis and Respiration
Explanation:
In photosynthesis C is used in the form of CO2.
In respiration C is released in the form of CO2.
Nitrogen-fixing bacteria change nitrogen into a form of soluble nitrates that plants can use ...the air is 80% nitrogen but it is in N2 form which plants cannot use
They are oxygen, carbon, hydrogen, and nitrogen.
Bitterness, saltiness, and sourness could not be detected by the tip of the tongue
Neurotransmitters is the word you're looking for.
