Carbon atoms are part of the carbon cycle, the movement of carbon from the atmosphere into organisms in the earth and then back into the atmosphere over and over again. Recall that plants remove carbon dioxide from the air and use it to make glucose during photosynthesis. Within the plant's body, carbon atoms might move from the glucose to a protein in a leaf cell. Then, when the plant dies and decays, the protein is broken down. The carbon atoms move into carbon dioxide molecules and again become part of the atmosphere. In another scenario, the plant may be eaten by a grasshopper and become part of its muscle. When the grasshopper dies and decays, the carbon returns to the atmosphere in a carbon dioxide molecule. Carbon also enters the atmosphere when carbon-rich fossil fuels formed millions of years ago when ancient plans, algae, and animals died and were buried. The dead plants, algae, and animals gradually decayed and became fossil fuels. Coal is burned in many power plants. Fuels refined from crude oil, power most car, bus, airplane, and truck engines.

Question

Carbon atoms are part of the carbon cycle, the movement of carbon from the atmosphere into organisms in the earth and then back into the atmosphere over and over again. Recall that plants remove carbon dioxide from the air and use it to make glucose during photosynthesis. Within the plant's body, carbon atoms might move from the glucose to a protein in a leaf cell. Then, when the plant dies and decays, the protein is broken down. The carbon atoms move into carbon dioxide molecules and again become part of the atmosphere. In another scenario, the plant may be eaten by a grasshopper and become part of its muscle. When the grasshopper dies and decays, the carbon returns to the atmosphere in a carbon dioxide molecule. Carbon also enters the atmosphere when carbon-rich fossil fuels formed millions of years ago when ancient plans, algae, and animals died and were buried. The dead plants, algae, and animals gradually decayed and became fossil fuels. Coal is burned in many power plants. Fuels refined from crude oil, power most car, bus, airplane, and truck engines.
Carbon cycle: Nature's way of reusing carbon atoms which travel from the atmosphere into organisms and then back into the atmosphere, over and over again. For questions 18-21 use the drop down menu to identify the movement in the carbon cycle.
There is 1, 2, 3, and 4 drop down menu's the following answers are for drop down menu's 1, 2, and 3 only.
A. Photosynthesis
B. respiration
C. combustion
The next answers are for drop down menu 4 only.
A. fossil fuels
B. combustion
C. respiration

GPT-4o mini · Answer

Based on the information provided, here are the appropriate answers for the drop down menus regarding the movement of carbon in the carbon cycle:

For the movement of carbon from the atmosphere into plants during photosynthesis: A. Photosynthesis
For the movement of carbon from the plants back into the atmosphere through respiration: B. Respiration
For the movement of carbon from fossil fuels back into the atmosphere through burning (combustion): C. Combustion

As for the fourth drop down menu, which appears to refer to the source of carbon that is being burned, the appropriate answer would be: A. Fossil fuels.

So, the selections would be:

A (Photosynthesis)
B (Respiration)
C (Combustion)
A (Fossil fuels)