Answer: A. combustion
Explanation: During complete combustion, carbon and hydrogen react with oxygen (O2) to produce carbon-dioxide (CO2) and water (H2O). The carbon-dioxide produced is released into atmosphere and is utilized for carbon fixation and recycling.
What do you mean unit 2.4 ???????????
Answer:
1 new DNA molecule, 1 old molecule is conserved
When a plant grows as mediated by growth hormones, the main plant organs at work are: stems and leaves.
