PDF chapter test TRY NOW

Fill in the blanks with the correct option given below in the table:
 
Carbon monoxide18.5carbon dioxidecarbon
Carbonfossilcalcium carbonatesproducers
0.04Carbon dioxidecarbon dioxidenatural carbon
carbon sinkdecompositionPlantscarbon cycle
 
1. __________ is the gas released by humans during the respiration process and taken by plants for photosynthesis. This is also a greenhouse gas.
 
2. The carbon content is released back to the atmosphere by __________ process when plants and animals die.